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Which frequencies / wave spring LEDs does a NorahLux lamp use?

All Norahlux lamps have a combination of 660nm and 850nm LEDs, divided exactly in half. This means 50% 660nm LEDs and 50% 850nm LEDs.

Only the safest, most proven wavelengths provide optimal health benefits. Natural light is a broad spectrum that includes many wavelengths and colors. Leading photobiomodulation researchers have found in numerous peer-reviewed studies that a narrow band of red and shortwave infrared light is the clinical sweet spot for health. The best light therapy devices use these proven wavelengths: red and infrared light in a range between 600 and 900 nanometers. 

clinical trials in red light therapy by country



What Is Cytochrome C Oxidase and What Does Red Light Therapy Have To Do With It?

Cytochrome c oxidase (CCO), is better described in the term electron transport chain complex 4. For every detail that is known about this, it is best to search for it. Youtube offers some graphical representations that make it a bit more tangible. During the fourth phase of cellular respiration (oxidative phosphorylation), specific wavelengths of red and short-wave infrared light break the bond between nitric oxide and CCO. This allows oxygen to bind to NADH, restoring the normal pathway for hydrogen ions to create the electrochemical potential that produces ATP (cellular energy). A simple way to think of this process is that photons are essentially charging your cellular batteries.

Activating cytochrome c oxidase is critical when it comes to photobiomodulation. With this in mind, let's look at the graph below, which shows the activation of CCO at different wavelengths. As you can see, there are specific absorption peaks in the 600nm and 800nm ​​ranges. For example, wavelengths in the 700-730 nm range have very little biological impact due to their inability to activate CCO efficiently. 

optical framework for light therapy biophotomodulation

How about using red light therapy with animals or plants?

Red Light Therapy has been (and still is) used successfully to help heal animals. Red light therapy is also often used to help plants grow.


How is Red Light Therapy different from the light of the sun or light bulbs?

Research has shown that light in the red and shortwave infrared spectrum has many benefits for the body. This light usually varies in frequency from 620 nanometers (nm) to about 1000nm. These specific wavelengths penetrate deep into the body tissues and are also very well absorbed by the body. This light range of 600-1000 nm makes up a very small part of the electromagnetic spectrum as shown below:

light spectrum information

in fact, it includes only a small amount of the visible light spectrum that we see with our naked eye plus a small portion that is invisible. 
Light sources such as the sun and regular incandescent light bulbs emit light in all spectrums of visible light - hence the name 'full spectrum light' and this is also why a Red Light Therapy device such as a NorahLux will emit a red glow, while the sun will emit a white -will give a yellow glow.

Please note - it should be noted that shortwave infrared light around 800-1000nm is actually not visible to the naked eye, but is part of the 'range' of the 'red light therapy' due to its health benefits.


Why can't I just use a halogen bulb or incandescent bulb as my red light device?

Traditional incandescent lamps, such as incandescent or halogen lamps, give off red light, but they also produce large amounts of heat with a wide wavelength band and are less effective for very specific therapeutic effects than their LED counterparts. 

Remember that not only the color of light (wavelength) is important, but also the amount of that light (power density). 


Do I need another NorahLux if I have a full spectrum infrared sauna?

This is a question that is often asked. Before we answer, let's say this - we sell specialty red light treatment devices AND specialty full spectrum saunas. They both have their main purpose. So yes, if you are looking for the benefits of 850nm shortwave infrared light, it is recommended that you purchase a red light bulb that emits this light more effectively, even if you have a full spectrum sauna. 


How long does a Red Light Therapy session last? 

The new short answer based on experiences is:

In most cases, a session has the best results between 10 and 15 minutes at a distance from the lamp of 10 to 15 centimeters. Of course you can still use the formula below, but in most cases a session of 10 to 15 minutes is perfect for the optimal result.


How long do I have to use red light therapy to see the benefits?

Like many things related to health - the answer is 'it depends'. It depends on the device being used, how long and how often your sessions are, your health problem etc etc. I know of family members and clients who have noticed less pain and inflammation after 1 session when using red light therapy, I personally needed a longer time for the benefits to be noticeable. And I also know that red light devices speed up wound healing and help me recover from workouts, and this happens after just a handful of sessions. 
Meanwhile, something like hair regrowth with RLT seems to take a lot longer - months, maybe even years of regular use before you see the benefits. As mentioned, it depends on many variables. The biggest variable is 'what do you mean by benefits'.

Naturally, the result also depends on the device used. Lasers as used in clinical applications often give faster results, but due to the size, this result only applies to a relatively small surface of / on the body. The downsides of these methods are therefore small result area and an additional risk of side effects. An LED light device such as a NorahLux has no known side effects and achieving results is therefore much safer than with lasers.

The format of the device you have purchased partly determines the result. For example, if it concerns your energy level, the larger the lamp, the faster you achieve results. If you mainly improve collagen in the face or other certain surfaces of your body, a smaller lamp is already sufficient.


Is red light therapy safe?

Red Light Therapy does not use drugs or surgery to improve your health. It simply uses light - light that is also naturally found in the sun. Devices with red light concentrate a certain wavelength of this natural light and create a higher level of 'natural light' than what we would be exposed to in the sun, for example. To the best of our scientific knowledge, there are no immediate dangers to red light therapy if done using a quality device. 


What distance should I keep from my red light device?

See my answer to the previous question - How long does a Red Light Therapy session last? - for more on this. But in a nutshell, 10 to 15 inches is ideal for a 10 to 15 minute session. With more distance, a longer session is also necessary for optimal results. See the video below for more explanation.


Do I have to wear eye protection glasses when using red light therapy devices?

This question has been asked a lot and a lot of research has gone into finding answers. After talking to many experts in Red Light Therapy, the usual answer is 
'no, you do not need to wear eye protection when using the red light therapy '. 
In fact, there are many studies showing that RLT is actually beneficial for eye health - especially red light around the 600nm wavelength. And I couldn't find any studies showing that the red light therapy damaged the eye. So, according to the most respected experts, the answer is: 
"No, it's probably good for your eyes. Light therapy can help with cataracts. Infrared LEDs can protect your retinal photoreceptors from damage."
Gembared, another company that sells red light panels, has this statement on their website regarding eye protection:

Red light is generally fine to look at, but be aware of any light sensitivities specific to you. We recommend that you initially use the product in a well-lit room so that your eyes can get used to the light. Keeping your eyes closed or looking away from the light while near the face is another great option. Don't hesitate to use glasses or sunglasses as you see fit or if your doctor recommends it.

While it is not necessary to point out, I know that some users prefer protective glasses when using their device with red light.

There is a very complete analysis of light and eye health available at They take the same view as the comments above - that red light (600-700nm) is safe for eye health. But concern is infrared light - this can overheat the eye. As an example, someone who works for an oven for years is more likely to have cataracts.

Some of the documents referenced in the article look at 850 nm wavelength. The author makes it known that the levels used in the study are similar to what you would receive on a clear day at the beach or in the snow. But there is still a potential for longer-term problems with eye health.

Our final advice: When using 850nm shortwave infrared on your face / eyes, it may be best to keep your eyes closed while the light is on. This helps lower the amount of NIR light that may be heating the eyeball.

The article also mentions a few other points:
- Blue light is 1000x more dangerous to the eye.
- RLT can help with eye wounds

Which wavelengths of light should I use?

It depends. It depends on what result you want. There are a plethora of published articles showing the effectiveness of certain red light wavelengths in helping the body. An English-language manual has been created to help you figure out which wavelengths are best for a particular problem HERE.

But in the comprehensive meta-analysis on light therapy entitled “The Nuts and Bolts of Low-level Laser (Light) Therapy,” the researchers stated:

"The wavelengths of light used (light therapy) fall into an" optical window "at red and NIR wavelengths (600-1070 nm). Effective tissue penetration is maximized in this range because the major tissue chromophores (hemoglobin and melanin) have high absorption bands at wavelengths less than 600 nm. "

Wavelengths in the range of 600-700 nm are used to treat superficial tissue, and longer wavelengths in the range of 780-950 nm, which penetrate further, are used to treat deeper tissues. Wavelengths in the 700-770 nm range have been found to have limited biochemical activity and are therefore not used.

If you're trying to choose a device with the most 'bang for your buck', you may want to find something with a minimum energy between 700-770nm light. For example, some lamps have power evenly distributed over 620 nm, 670 nm, 760 nm and 830 nm wavelengths. While all spectra fall within the 'optical window', the 760nm light may have been wasted when it comes to health benefits 'according to this report'.

Of course, only 660nm and / or 850nm is less variety, but at least you know that all the light emitted is well utilized by the body (and both the wavelengths between 600-700 and 800-900nm have a lot of evidence behind their effectiveness).

What's the difference between 660nm and 850nm?
In simple terms, the 660nm light is more quickly absorbed by the skin, useful for those looking to reduce wrinkles, boost collagen, and reduce scars and stretch marks.
The 850 nm light goes deeper into the body and helps with inflammation and joint pain and muscle and organ recovery and health.

What to look for when buying a red light therapy device

When it comes to buying a red light therapy device, you're in luck as there are many companies that have devices in the market, but the downside is that it can be difficult to know which device is best for you.

There are a few things to keep in mind when buying a Red Light Therapy device. Knowing what to look for can help you avoid unwanted products that cause more damage than desired, and enable you to find the best lamp for your purpose at the best price.

We should inculcate this answer by saying this - the right device for one person may not be the best device for another. It really depends on your purpose - what you want from the device, and mainly your budget, too.

The two most important things to consider when buying a Red Light bulb are:

  1. Wavelength 

  2. Power density / irradiance intensity

Why are these matters critical? What do they mean? And what is a good or a bad price? 


Light consists of different lengths of waves - blue light has a wavelength of about 450-500nm. Red light is about 600-700nm. Invisible infrared light has lengths above 900 nm.
When buying a red light therapy lamp, it is important to know that you are getting the correct wavelength. Not all red light is created equal.
For example, some wavelengths of red light are better than others. And some wavelengths are better at treating certain conditions than others.

What is a good overall wavelength?

If you don't want to spend hours researching on pubmed, I would suggest going for a mid 600nm (630-670nm) wavelength and a mid 800 (830-850nm) shortwave infrared wavelength.
If you find a panel that emits this light (or both lights like the NorahLux bulbs do) then you have a winner.

What if the manufacturer doesn't specify the wavelength?

Do not buy it. You just don't know what you are buying. 
Unless you buy it and have a spectrometer in your hands (used to measure wavelength) and test the output yourself? Then if it sends out wrong wavelengths, or not the wavelength you hoped for, just return it. Otherwise you're taking a gamble, you don't really know what you're buying.

Please note that shipping costs abroad are often very expensive and you will not receive the import duties that you have already paid on an imported lamp. Also, some foreign companies do not make returns at all.

Power density / irradiance intensity

The second thing to know when looking for red light therapy devices is power density or irradiance. This is a value measured in milliwatts per square centimeter (or mW / cm2), which is simply the light intensity over an area. It shows how many photons are passing through an area.

Why is it so important?
If you don't take the power density into account and just look at the wavelength, you could end up with a low power red light that has no healing effect on the body.

Even if the light is the exact wavelength you want, if the power density is low, it won't help you achieve your goals.
This is why a red LED Christmas light is not effective as a light therapy light source. It emits red light, but the power density is so low that it will have no effect on the body.

Having sufficient power density makes the difference between an exposure of 10 minutes or an exposure of 1 hour, or the difference between a result and no result! 

What is a good wattage value?

Again, it depends. What are your goals, how many LEDs are there, what is your budget. In general, the higher the power density / irradiance, the better the lamp (and the less time you need to take advantage of the benefits).

A few things to note:

Power consumption versus Irradiance 

The power consumption of the unit is different from the irradiation intensity. Power consumption is simply the amount of electricity required to power the device. It is the power that goes from the wall to the device before it is converted to red light. 

Just because an RLT device has a high wattage doesn't mean that all of this electricity is converted into beneficial red light. This is why a high heat output from red light panels means that a lot of power is wasted.

Power density at a distance

Also, the power density decreases as you move away from the light source. Make sure you know the necessary values ​​at the distance you will have for the device. For example, some manufacturers will list a power density / irradiance that appears good, but they do not specify the distance to which this figure corresponds.

If you look in the chart below, let see the decrease in power density with distance from the light source:

you will see the figure of 200 mW / cm2 when you stand against the lamp, but only a 20 mW / cm2 result at 40 cm away. Most people will not press their bodies against the lamp when using it which is also unnecessary and causes slightly more emf reception.

In actuality, you will be about 5-10 cm away from the light panel when you use it. For the example above, this means that the actual power density will be approximately 100-120 mW / cm2. Not the full 200 mW / cm2. 

Another example is In the image below, you can see how their RedRush 360 panel emits 105mW / cm2 at 6 inches, but at 36 inches, the power is below 15mW / cm2.

On the plus side, due to the angle of incidence of light emitted by the light, the coverage area is much wider.

Be aware of this when looking for devices with red light. If the stated energy density number does not indicate the distance it was measured, assume it is near the light source. Standing next to the light source may be unhealthy if nnEMF levels or heat output are high.

Respectable manufacturers will list not only the power density figures, but also the measured distance. 

What if the producer does not disclose the power density number?

Don't buy it until you have these numbers. I recommend emailing them and asking what their power density / irradiance values ​​are for the device and ask them at what distance these values ​​were measured. If they don't reveal it, then you can start wondering… Any manufacturer who believes in their product and understands red light therapy knows that power density is an important factor in making and using red light devices.

If they don't share this data then you should assume that they don't want you to know the actual output, and so you would probably waste your time and money with the device. Although that does not mean that the device will not be effective, it is just that you do not know exactly what you are working with and if you want to calculate the dosing time that is not possible.


How can I measure the effectiveness of a red light treatment device?

Use a radiation meter to measure the light intensity and the wavelengths with a spectrometer.

You can also use a solar energy meter to measure watts per cm2. But beware: these are only suitable if you are measuring a light with a single wavelength. Lamps with a range of wavelengths, such as standard incandescent lamps, cannot be tested with a solar energy meter because too many irrelevant wavelengths are being measured. 

However, if you are very serious and want a very accurate wavelength measurement, you can look for a dedicated infrared light meter to measure light above 750nm, as most spectrometers are designed to measure visible light. Most suppliers start from the values ​​supplied by the manufacturers, of course, this usually yields fair results, but measured with a meter which gives high results. As indicated earlier, there is as yet no standard with which to measure. 

Relying on your own senses is already a reasonable indication. Do the red LEDs look red or very orange? (Orange has its own positive effects on the body, so this does not have to be wrong) and the infrared LEDs should have a red glow in the core in the dark but should be very weak and invisible in other (brighter) light and give off a light pleasant warmth. 


Is there a difference between devices with red light that flicker or pulse and devices that don't?

There are some studies with pulsed light that show benefits, but there are also several studies that suggest that pulsed treatments are no more effective than the sum of the "on" time. That is why we try to give our LEDs as much “on” time as possible with efficient power consumption. There are hundreds of studies that prove this to be effective.

There are three ways in which pulsing can help: 

  1. Strong pulsing will reach deeper tissue. By immersing CCO absorption sites in shallower tissue with short strong pulses, more of the remaining light energy will be available to deeper tissue. Not pulsing at an equally strong intensity will be better because it will take much less treatment time, but the device may become too hot.
  2. If there is a "luminosity threshold effect" in cells, strong pulses may be better. By this I mean that there may be something in tissue that requires a certain amount of "activation energy" to cause a reaction rather than the individual photon theorem.
  3. If there is something interesting in the tissue that responds to certain types of pulses as described above. It would take a tremendous amount of clever research to determine what kind of pulsing is best (duration, waveform and / or pauses).


Can I use a red light therapy lamp more than once a day?

Certainly. Keep in mind that for optimal results, there is an upper limit on the dose of your red light therapy. After that you may see decreasing returns.

More is not always better. That said, the risks associated with red light therapy overdose are much lower than UV light overdose.

Using too much red light usually means that the effects of red light therapy are greatly diminished. Reduced effects mean you simply won't get any benefit from the session - on the contrary, UV light can actually damage you if you apply too much of it. 

This optimal dose means that the red light therapy follows an inverted U-curve, where either too little or too much red light therapy is of no benefit and only optimal dosing provides the most benefits. 

As you can see from the picture above, it is still important to set the correct dose to get the most benefits from red light therapy.

The dose of red light exposure varies between your target, the distance from the device, the device itself, etc. And, of course, the time you spend using the device. There is no reason why you can't use your RLT more than once a day. The question is, do I have to use the lamp several times a day?


When I use my Red Light Therapy device everything appears green and blue. Why is this?

The eye becomes saturated in red light when exposed to red light devices, in turn the eye increases sensitivity to other colors such as blue and green. 

When you move away from the source of red light, it takes some time for the vision to normalize, making your surroundings appear much more blue while the reds are dimmed.

It only takes a few seconds to adjust back to normal conditions. said the following:
"Your eyes will adjust to the bright red light after a few sessions and it will even be beneficial for them, improve general vision and prevent AMD / cataracts / etc. If you are very sensitive, you should put shortwave infrared light on it. use face instead of red (as shortwave infrared is invisible and the eyes are not over-stimulated). "


My local salon / gym / health center has a red light, is this a good device?

It depends on the device they are using. Is it a NorahLux? Otherwise: NO! : D
Now seriously:
If it's a NovoThor or MitoGen red light bed, yes, these are high quality devices! Probably the best on the market (these devices can cost over $ 100.000!)
Otherwise, you may have to do some digging around the quality of the device. Use the knowledge from our articles or from the articles by Joovv or RedLightMan or from experts such as Jack Kruse or Dave Asprey.


Can I use red light to help my skin?

Red light therapy has been proven to improve the appearance of the skin without causing known side effects. Red light therapy increases blood flow to the skin, which increases skin regeneration. 

In addition, red light activates stem cells around the skin, which then help them multiply into new skin cells. In turn, many skin processes improve, such as reducing acne, inhibiting skin scarring, reducing sunburn, inhibiting stretch marks, and even helping burn burns heal.

Red light therapy can also improve skin conditions such as rosacea, eczema and psoriasis. The skin will be tighter and smoother, wrinkles will get smaller and smaller and the collagen density of the skin will improve. The feeling of the skin and the complexion are also improved. 

How do you reap these amazing benefits?

Make sure your red light bulb emits a visible red light (range 600-700 nm). And aim to use the device for 5-10 minutes a day (although the duration and distance from the light source depend on the output power of the light).

Studies have shown that when using a red light therapy lamp for skin benefits, you don't need as high a dosage requirement as for deeper tissue benefits.


Can you tell me how to use red light to boost testosterone?

Optimal hormone functioning already starts in the brain. Different areas of the brain, such as the hypothalamus and pituitary gland, are involved in that process. However, until recently, it was not known that thyroid function also affects the production of steroid hormones. Thus, improving thyroid function also improves the production of steroid hormones, such as testosterone. To achieve this effect, you must specifically use the red light therapy lamp on your thyroid gland. 

In addition to enhancing steroid action by thyroid hormones, red light therapy can also increase steroid hormones such as testosterone by directly stimulating energy production in associated organs. An example is testosterone production in the testicles. 

Remember, red light can penetrate deep into the body, increasing energy production in specific organs. When the right dose of red light therapy is applied to the testicles, the testosterone level can even rise up to three-fold. 

A few important points are:

  1. In most cases, red light treatment directly on the testicles for short regular periods would increase testosterone levels over time.
  2. Stick to LED light therapy for maximum safety and benefits. Visible red (600-700nm) LEDs are optimal. Session time of 2-20 minutes depending on the light intensity / heat.
  3. Red or infrared light from an LED source (600-950nm) can be safely applied to the testes without risk of side effects or damage, while delivering all the benefits; improved fertility, improved testosterone production, etc.
  4. Sunlight can also be used on the testes, but only for short periods and it is not without risks.
  5. Avoid exposure to blue / UV light.
  6. Avoid any kind of heat lamp / light bulb.


Can you tell me how to use red light therapy to help with oral health? 

Much research has been done on the treatment of red light and its benefits for oral and dental health. Red light therapy applied to the teeth reduces tooth hypersensitivity, reduces the harmful bacteria in the mouth, heals wounds and mouth ulcers, and increases bone remodeling after dental damage. This means that red light therapy can help a good dental practice, acting as a holistic method to improve all-round dental care. 

To use a red light therapy for oral care, the light must not only penetrate the cheeks, but also the light must reach the teeth. You can just use red light therapy for a few minutes every day after brushing your teeth. 

It is important to use a strong red light panel to ensure that you get adequate light penetration through the cheek.

The main requirement for oral light therapy is the ability of the light to penetrate the cheek tissue and then penetrate the gums, enamel and bones as well. Skin and surface tissue blocks 90-95% of the incident light. Stronger light sources are therefore necessary with regard to LEDs. Weaker lighting fixtures would only affect surface issues; unable to eliminate deeper infections, treat gums, bones and reach more difficult molars.

If the light can penetrate the palm of your hand to some extent, it will be suitable for penetrating your cheeks. Infrared light penetrates to a slightly greater depth than red light, although the power of the light is always the most important factor in penetration.

We recommend red / infrared LED light from a concentrated source (50 - 200mW / cm² or more power density). Lower power devices can be used, but the effective application time would be exponentially higher.

Red and infrared LEDs are both effective for oral light therapy. Session time of 2-10 minutes, depending on the light intensity / heat. Stronger light is required for cheek / gum penetration. Alternatively, you can also invest in a smaller portable unit to help with oral health.


What's so special about LEDs for red light therapy?

Simple - it is an energy efficient way to emit a very special wavelength of light. Other bulbs, such as incandescent or halogen bulbs, emit a range of light, including red, green, yellow, blue, and possibly invisible light such as UV or infrared. This means that you have to expend a lot of energy to receive only part of the therapeutic red light.

LEDs or Light Emitting Diodes - on the other hand, can be fabricated to give a precise wavelength of light - 660nm, for example - without emitting any other light.

This means that the LEDs convert more power into the useful light that users of red light therapies are looking for. In addition, there is less heat from LEDS - because heat can negatively affect the body or some of the benefits red light has on the body (for example, red light on testicles has been shown to improve testosterone levels, but heating testicles can reduce testosterone levels. 


What is the difference between these red light devices and grow lights that gardeners use?

Power density / irradiance intensity. That is the main difference. The power density of most grow lights is very poor. Usually less than 10 mW / cm2 a few centimeters from the light. Much lower than the 100-200mW / cm2 ranges emitting red light therapy devices. 
This is a comment RedLightMan made about grow lights:
the wide positioning of the LEDs, the wide beam angle etc. that you will find in these types of 'grow light' devices in general make them unsuitable for light therapy.

Like so many things in life, you get what you pay for. A $ 30 red LED light on Amazon does not have the same properties as a specially designed $ 1000 red light device. Grow lights are designed to grow plants. Red Light Therapy devices are designed for red light therapy.

Apart from that, grow lights for plants have a broader spectrum as plants need blue (UV) light for photosynthesis, this is not what you are looking for in red light therapy.


What is the difference between Red Light Therapy, Photobiomodulation, LLLT and Light Therapy?

LLLT stands for 'Low Level Laser Therapy' - where lasers are used to radiate a specific wavelength of light onto the body for its curative and therapeutic benefits.

Red Light Therapy involves the use of red and shortwave infrared light for its curative and therapeutic benefits. This light can come from LEDs, lasers, light bulbs or even the sun.

Photobiomodulation (PBM) is another name for the use of low power lasers or LED lights that deliver a specific wavelength to aid the body. In essence, photobiomodulation is the same as low-grade laser therapy. And Red Light Therapy falls under these terms because it only looks at the red and infrared wavelengths of light.

Other names for PBM and LLLT may include: low-power laser therapy (LPLT), low-intensity laser therapy, cold laser therapy, low-energy laser therapy, bio-stim laser therapy, photo-biotherapy, monochromatic infrared light energy (MIRE) therapy, and therapeutic laser .

Light therapy - also known as phototherapy or heliotherapy - looks at light (of different colors from different sources) to help with medical conditions, sleep disorders, jet lag, seasonal affective disorder, and vitamin D deficiencies. 


What is the difference between red light and shortwave infrared light?

Shortwave infrared (NIR) light is invisible to the naked eye and has a wavelength from ~ 700nm to ~ 1400nm.
Red light is visible to the naked eye and has a wavelength of ~ 600nm to 700nm.
Both types of light have been shown to be beneficial for healing and well-being. With NIR light below 950 nm with the deepest skin penetration (2 to 3 mm versus the 1 to 2 mm with red light and NIR light with higher wavelengths).

The main difference between these two wavelengths is their ability to penetrate skin tissue. Red light waves at 660nm are more quickly absorbed by the outer layers of your skin, producing collagen, resulting in numerous benefits, such as wrinkle reduction, improved skin tone, and fading of scars and stretch marks. 850nm shortwave infrared light generates much the same cellular response as 660nm red light, but a greater percentage of shortwave photons can penetrate deeper into your body. This is consistent with benefits such as reduced joint pain and inflammation, improved muscle recovery and nerve regeneration. These advantages of shortwave infrared light at 850 nm are supported by a large number of studies that we have covered in several articles.

An additional difference is that 850 nm LEDs produce a 30% higher radiation intensity with the same wattage. The combination of these factors leads to some impressive results!  


What is the difference between red light and sunlight? Will I not get the benefits of red light therapy by being in the sun?

There are two problems with using the sun as a source of red light for RLT, these are:

  1. Getting the correct wavelength of light at the correct intensity, and
  2. The other wavelengths of light that you are exposed to at the same time (this can affect the effect of red light on your body. For example, red light can aid in collagen production and wrinkles, but UV light can damage collagen and lead to wrinkles).


What is the difference between illuminance and power density? And can a lux meter be used to measure power density?

A lux meter measures illuminance, the light intensity of light that is visible to the human eye. The light is measured in lux or lumen per square meter. Green and yellow are some of the brightest colors in the visible light spectrum.
Wikipedia says this:
"The lux is one lumen per square meter (lm / m2), and the corresponding radiometric unit, which measures the irradiance, is the watt per square meter (W / m2). There is no conversion factor between lx and W / m2; there is a different conversion factor for each wavelength and it is not possible to perform a conversion unless one knows the spectral composition of the light. "

Therefore, a lux meter is not a reliable tool to measure the specific power density of the wavelength.

You may have also heard of a PAR meter - this is used by plant growers and it measures the light used by plants in photosynthesis. Therefore, a Lux meter and a PAR meter will give different results from the same light source.


What is Polychromatic Light Therapy?

Polychromatic light therapy means that multiple wavelengths of light are used simultaneously. All our lamps contain both 660nm and 850nm light.
What are the pros and cons of this?
Benefits - exposure to multiple wavelengths (and the unique benefits that come with each wave).
Cons - less exposure to a particular wavelength.


Does Red Light work through clothing?

If the material blocks light, it will affect the effectiveness of the red light device. Clear clothing or material will also allow light to pass through to a certain extent, but thick clothing or black colored clothing will block the light.

For best results, use the light on bare skin.


Can you tell me how to use red light to aid in wound healing after surgery?

The team of had this to say about wound healing:
"Certainly, almost all of them are suitable for such surgery. Red lights will be better for more superficial skin damage from surgery. Shortwave infrared is better for substantially deeper tissue damage from surgery. In your case, a combo light might be the most ideal. Using the light at about 50-100 mW / cm2 is probably ideal for fairly deeper surgical damage. 5-10 minutes is fine from about 10-20 cm away. "


Will the red light device affect my sleep?

It is well known that blue light suppresses melatonin, increases cortisol and disrupts sleep. A quality red light device should not emit blue light. But there is some evidence that red light can have a minor impact on sleep if the light intensity is strong enough. I personally do have a lighter sleep when I use red light late at night. But I do have friends and clients who have noticed that their sleep stays just as deep when using red light right before going to sleep.

For this reason, we recommend that you do your red light session in the morning or during the day. If that doesn't work, try to keep your red light session as far away from your bedtime as possible, or experiment whether or not the light affects your sleep. Perhaps most importantly, given that the healthiest people need an average of 6,5 hours of sleep per day, see if the difference is less sleep and just as much energy.

But all this is irrelevant if you 'don't block blue light in the evening, we now also sell special glasses for this!


Are There Any Side Effects of Using Red Light Therapy Devices?

Worst case side effects of red light therapy are headaches and exhaustion, because the body requires a lot of energy for the healing and mitochondrial building processes that result from red light treatment. Fortunately, red light therapy can never result in sunburn because no device emits UV radiation.

Also consider asking the company how high the device's emitted non-native electromagnetic frequencies are. Some users have reported that their LED red light therapy devices emit large amounts of foreign electromagnetic frequencies.

Finally, it is advisable to avoid red light therapy after sunset. On the one hand, red light therapy will never suppress melatonin levels like blue or green light. But on the other hand, red light can suppress melatonin levels when the light intensity is strong enough. You don't want your melatonin levels to be suppressed, of course, because optimal melatonin levels are needed for deep sleep. Therefore, always test the influence of red light on your sleep if you use it after sunset before making a fixed pattern.

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