Start your search for light therapy devices here. This guide covers exactly what to look for in a red light therapy device.
With red light therapy exploding in popularity, consumers are facing a flood of light therapy devices on the market. It’s becoming trickier than ever to find the right one.
How can you choose a red light therapy device that’s high quality and support you and your client’s wellness?
Start by comparing these two outputs. The effectiveness of red light therapy (RLT) therapy depends on:
These features – along with the device’s distance to the body – greatly affect performance. A device that produces the wrong wavelengths of red light or low-power light, for example, may not deliver real wellness results.
We cover irradiance and wavelength in this guide, along with 5 other essential features to look for in an RLT device. Keep reading to learn how to choose a red light therapy device that can help you reach your wellness goals.
The best red light therapy devices offer high-quality light. This isn’t just a red-colored bulb in a lamp.
The light from an RLT device has the right power density and wavelength(s).
Here’s a breakdown of these two important factors:
Irradiance, as it relates to red light therapy, refers to the intensity of the light delivered to the skin or target tissue.
Imagine a red light device is like a shower head spraying light particles. Irradiance is a measure of how much light energy hits a specific area over a set time.
In other words, if you want to measure dosage, the output of the “shower head,” its irradiance so to speak, matters a lot.
A RLT device’s irradiance directly impacts the effectiveness of treatment. It is especially important if your goal is to treat deeper tissues.
Here’s how:
Choose a red light device with irradiance levels between 25 mW/cm² and 120 mW/cm². Levels within this range are generally considered safe for most red light therapy applications.
However, also note that irradiance can change, depending on your distance to the device. The closer you are, the higher the irradiance. (Just think about it like you’re standing closer to the shower head.)
Proper dosage for red light therapy treatments can be calculated with irradiance.
Dosage (expressed in Joules/cm2) is the irradiance multiplied by the treatment time. Therefore, our red light therapy bed, which delivers a variable irradiance of 34 to 100 mW/cm2, provides a dose of roughly 20-50 J/cm2 per 10-minute session.
When determining dosage, consult with a medical professional for guidance and safe use suggestions. According to some research, dosage ranges for surface-level injuries (about 1 to 10 J/cm2), while deeper treatments require 10-50 J/cm2.
Wavelength is just as important as irradiance. Generally, red light therapy devices deliver one or more wavelengths of red or near infrared light.
All of Hue Light USA’s red light devices, for example, provide a range of red and NIR wavelengths (from about 660 to 850 nm). Plus, our best-in-class photobiomodulation bed also delivers green light, which benefits the skin.
In general, look for a red light device that offers a range of visible red wavelengths (630-680 nm), as well as infrared light (800-830 nm), which studies show are the most beneficial.
Wavelength affects the penetration depth of the light.
Research suggests visible wavelengths (around 660 nm) don’t penetrate as deeply as NIR light, and these visible wavelengths are typically recommended for treating the skin. For deep tissues, like sore muscles or joints, near-infrared light is ideal. Some studies suggest NIR light can reach up to 10 mm in depth.
Irradiance and wavelength, ultimately, go hand-in-hand. NIR light with a stronger intensity (irradiance) has the potential to reach the deeper layers more effectively.
In addition to irradiance and wavelength, you’ll also want to compare red light devices on these factors:
Pulsing light in red light therapy devices has become a growing trend. For example, all of Hue Light USA red light therapy devices include pulsed light settings (based on the Nogier frequencies), as well as continuous settings.
Why choose a red light device with pulsed light?
Although research is ongoing, some studies suggest red light therapy with pulsing helps to:
Continuous red light devices heat up the tissue steadily during treatment. With pulsed light, however, the tissue has a chance to “cool off” in the fractions of a second the light turns off between pulses.
This could allow for higher overall irradiance levels without exceeding safe temperature limits. As a result, a pulsed light device might help to deliver a higher total dose in a shorter amount of time.
Some studies suggest pulsing red or near-infrared light might promote relaxation and improve cognitive function. This is due to a process called entrainment. In theory, your brainwaves synchronize with the pulsing light rhythm, which may help to promote relaxation.
This is the big one. Early research suggests that pulsed light may influence the cells differently than continuous light. Some researchers theorize that pulsed light may improve wound healing or post-stroke care; however, in other cases, continuous light outperforms pulsed light (e.g., for nerve regeneration).
Compare red light devices based on their number of LEDs. More LEDs provide better coverage and even distribution of light.
Although there’s not a specific amount to look for, here are some estimates:
Choose a light therapy device that targets a specific area. For example:
Also, the device should offer comfort. Avoid a device that you’ll need to hold very close to your body for long periods of time to receive the desired irradiance.
This is true especially for clinics: Think about the portability and durability of the device. For example, a red light therapy bed can be great for full-body treatments; however, it’s not portable.
For a clinic that needs portability, a panel (which can be rolled to hang over a massage table) offers a better solution.
The most reputable red light devices have been FDA registered. This indicates the company values safety, and that the device may have been tested for safety. Cheap red light therapy devices may not be properly safety tested.
Quality devices tend to have extended warranty coverage. The company stands behind the product and may even offer support to address user problems.
For example, all Hue Light USA red light therapy devices have:
Our full-body systems, for example, have some of the most comprehensive warranties in the industry. Extended warranties are especially useful for clinics and spas, as the devices will be in more frequent use.
The effectiveness of red light therapy is very dependent on the quality of the light. A device that puts out low-quality (the wrong wavelengths or low-power light) doesn’t offer the best support for your wellness
So, remember:
Focus on those features, you’ll be on your way to choosing a quality RLT device.
The history of red light therapy can be traced back to the early 20th century, when the Danish physician Niels Finsen developed a method to treat skin tuberculosis using concentrated light radiation.
Today, red light therapy is recognized as a promising and versatile therapeutic approach with numerous potential health benefits, and there’s a growing body of evidence supporting its efficacy and safety across various medical disciplines.
Unfortunately, as a result of this growing popularity, the market has become flooded with medicore (or downright useless) red light devices. My goal with this article is to give you the necessary information to choose a high-quality red light device that has the ability to deliver the specific health benefit you’re after.
In general, you should look for a red light device that emits light in the proper wavelengths, strength and dosage.
For example, if you’re trying to treat issues associated with your joints or deep muscle tissue, you need a red light device with high-emissivity lasers or LEDs that emit a fairly narrow light cone to ensure deep tissue penetration. On the other hand, if you’re trying to treat skin issues, a high-quality red light panel or a skincare wand might be your best bet.
I’ve been using a wide variety of red light devices over the past few years to treat stubborn joint injuries, speed up muscle recovery after intense workouts, positively influence my circadian rhythm, and improve my skin health. As a result, much of what I share in this article is based on both scientific evidence as well as several years of hands-on experience.
When assessing the factors associated with choosing a red light device, I encourage you to ask yourself the following questions:
Based on my hands-on experience with a variety of red light devices, including those my wife and I use regularly, here are the top factors you should take into account before pulling the trigger.
Most of the red light devices I own actually use a combination of red light and near-infrared light for optimal performance.
That’s because each wavelength transports a certain amount of energy into the target tissue at varying depths. For example, red light has a shorter wavelength than near-infrared light, thus transporting more energy but offering less penetration. Combining red and near-infrared light ensures that the cells at various tissue depths receive enough energy from photons to cause downstream effects, such as improved mitochondria function and increased blood flow.
The notable exception is skincare devices (i.e., those aimed at reducing fine lines and wrinkles), which often only emit red light. For example, my wife has been using Solawave, a skincare wand that uses red light-emitting LEDs, to improve the appearance of her skin.
But if your goal is to speed up the healing process after an injury, to treat an inflammatory condition such as arthritis, or to support the regrowth of cartilage tissue, you need a device that emits red and near-infrared light in the appropriate wavelengths and the proper intensity.
Additionally, it’s worth noting that most of the red light devices on the market leverage light-emitting diodes (LEDs) because they’re fairly cheap to manufacture and provide enough power (wattage) to be effective. The potential issue with LEDs is that they also emit a fairly wide cone of light, which can reduce their effectiveness when treating tissue several centimeters below the skin (e.g., larger muscle groups or joints).
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That’s why many devices used in the medical field, and a few consumer-grade devices (such as the Kineon Move+ Pro), use a combination of lasers and LEDs.
Lasers emit a relatively narrow light cone, which helps with sending light (photons) at the proper dosage deeper into the target tissue. That’s why I exclusively rely on the Move+ Pro for treating exercise-induced injuries that require deep tissue penetration to speed up the healing process.
However, I might use LED-based devices for general wellness applications, including skin care or sleep optimization.
For example, I use a high-quality red light panel from Mito in the morning to support my circadian rhythm and to make my skin more resilient to UV light. In the evening, I might use a red light mask from Sun Home Saunas to support optimal skin health. And when I have a tight lower back from lifting heavy weights or shoveling dirt in the backyard, I might use a red light therapy belt from Mito.
Each wavelength of both the visible and invisible light spectrum carries a certain amount of energy, which determines how the cells in your body react to it.
As a rule of thumb, shorter wavelengths carry more energy but penetrate tissue less deeply, while longer wavelengths carry less energy but better penetrate tissue at greater depths.
That’s why it’s important to pick a device that emits the proper wavelengths based on the desired health benefits and the type of tissue you’re trying to treat.
For example, using a device that emits only wavelengths in the red light spectrum won’t be effective for treating joints or deep muscle issues because it doesn’t penetrate deep enough.
The other factor to consider is that not all cells in the body have the same photoreceptors. In other words, the cells in your skin may respond differently to certain wavelengths than those in your muscle or joint tissue.
Fortunately, scientists have been experimenting with red and near-infrared light for decades, resulting in a comprehensive database of how specific wavelengths benefit certain use cases.
The only problem is that there doesn’t appear to be a single wavelength that works best for all use cases, which is why most manufacturers of red light devices use LEDs that emit a combination of wavelengths.
For reference, these are the most effective wavelengths for common treatment areas:
I recommend looking for red light devices that emit light in some of the wavelengths listed above.
One of the most important factors that determines the effectiveness of any red light device is how much of the emitted light (in the form of photons) reaches the target tissue.
In the realm of infrared light, the term “emissivity” is often used to describe how effectively the device’s LEDs can emit thermal radiation. In the realm of red light, the term “irradiance” is typically used to describe how much of the emitted energy is received by the surface of the skin.
Depending on what you’re trying to accomplish with your red light device (i.e., what tissue you want to treat), your device must feature an appropriate irradiance expressed in milliwatts per square centimeter (mW/cm²). This is also known as optical power density.
Note that most manufacturers (except infrared sauna brands) only publish irradiance statistics, because that’s what ultimately matters. If you can guarantee that a certain amount of light is hitting the target skin, it doesn’t matter how good the heaters are at emitting light; the latter influences the former, but there is no need to keep track of both since only the end result is important. Hence, you won’t typically see an emissivity figure on a red light device’s documentation.
Here are some examples of effective devices we use at the Kummer household and their optical power density (irradiance) ratings (the links below point to my review of each device):
As you can see, you don’t need high irradiance to improve the health and appearance of your skin. However, the deeper you need the red and infrared light to penetrate your tissue, the more light intensity is required.
Another important factor when talking about light intensity is the difference between pulsed light versus continuous light.
High-end devices, such as the Move+ Pro, use pulsed light to output higher energy levels without causing tissue damage. Devices that leverage continuous light have to operate at lower energy levels. And while that’s fine for treating skin issues, that lower-intensity light isn’t strong enough to penetrate joints or muscle tissue at effective depths.
Conversely, pulsed light devices are also effective for treating skin issues. So, if you have multiple use cases, I recommend getting a pulsed light device, such as the Move+ Pro.
And yes, the number of LEDs a device has plays a role in the total wattage. However, it doesn’t impact the milliwattage per square centimeter, which is the metric that matters most when determining optical power density.
Distance is a crucial factor for determining effective light dosing because it influences how much energy the target tissue receives. For example, a red light device that delivers light in an effective dosage when in close contact with the skin (the target tissue) might be 100% ineffective when held five inches away from the skin.
Because of this, you want to look for red light devices that emit the right wavelengths at the right light intensity to achieve the desired results while making it feasible to maintain a consistent distance between the light source and the target tissue.
That’s why I prefer wearable devices over red light panels when treating injuries or pain. Using a wearable, I can maintain the appropriate distance between the light source and the target tissue (e.g., my lower back).
In fact, red light devices are typically most effective when they’re in direct contact with your skin. For example, placing the Kineon Move+ Pro a few inches away from an injured joint would render the device ineffective.
That’s one of the reasons why it’s difficult to get the dosing right with red light therapy panels, unless you lie down and leverage a horizontal stand to position the panel right above your skin.
Some of the devices listed above — including the Kineon Move+ Pro, the Radiant Face Mask from Sun Home Saunas, and the Solawave — meet all those requirements. In contrast, Mito’s red light panels put the burden of maintaining a consistent distance to its LEDs on you, especially if you want to use the panels for treating tissue below the surface of the skin.
In addition to the effectiveness of a particular device for treating a specific area, you also need to consider the practicality.
For example, you wouldn’t want to use Solawave for whole-body skincare treatments despite the device’s effectiveness in treating skin issues, because each whole-body session would take you several hours. In other words, the surface area emitting the red light is simply too small for treating larger areas.
As a rule of thumb, the larger the treatment area is, the more I lean towards using red light devices with a large emission area. For example, if my whole body aches after an intense workout, I jump into our full-spectrum infrared sauna with red light instead of using wearables.
For back pain, I might use a red light belt or a red light panel (while maintaining a close distance to the light source). If I’m suffering from knee pain or a strained muscle, I use a specialized wearable such as the Kineon Move+ Pro.
Of course, I always aim to use a device that has been proven to be effective for treating a certain area. In other words, I don’t recommend relying on a regular red light panel to treat worn-out cartilage tissue in your knee joints, because the light won’t be able to penetrate your knee capsule. Instead, you have to work with a high-quality wearable with the right dosing protocol for such cases.
Here are some examples of devices I use for a variety of use cases:
As you can see, no device works great for every use case, but some devices can handle multiple treatment areas.
Red light therapy is most effective when leveraged consistently over the course of several weeks or months, depending on the underlying condition you’re treating. That’s why it’s important to choose a device that’s easy to use and that doesn’t get in your way or disrupt your daily routine.
If using a red light device feels inconvenient, you will probably stop using it before you can reap its benefits.
That’s why I prefer devices that I can use passively (like a wearable I can use while working on my computer or watching TV), or which require minimal time investment.
For example, when I get into my office in the morning, I take off my shirt and expose my upper body to red light using a red light panel from Mito without having to stop or disrupt my work.
The same principle applies to the Kineon Move+ Pro that my wife and I use for treating injuries and bee stings (we’re beekeepers and get stung several times a year), and speeding up muscle recovery after intense workouts. Thanks to its flexible straps, we can wear the Move+ Pro while having dinner, watching TV or working on the computer.
Conversely, there are some red light devices on the market that require a more proactive treatment approach. For example, the Solio Alfa+ is incredibly effective for treating muscle pain, but it requires you or someone else to rub the device in circles over the affected area for up to 20 minutes. While that’s not a big deal if you suffer from a severe injury, it’s an inconvenience that might lead some users to abandon the treatment after a couple of days.
The bottom line is that the easier a red light device is to use, the more likely you’ll be to stick with the recommended treatment protocol. That’s especially true for complex injuries that may take several months to treat.
While I recommend spending your money on devices that emit high-quality light in the proper wavelengths and intensity, some offer additional features that are nice to have.
For example, the Kineon Move+ Pro has a travel pouch that doubles as a charging station. In other words, you can charge the individual light modules of the Move+ Pro without having to take the device out of its case.
That’s not only convenient when you take the Move+ Pro on the road with you, but it also reduces countertop clutter when you charge the device at home.
Another example of a nice-to-have feature is the ability of the Sun Home Saunas Radiant Face Mask to emit blue light to treat blemishes and fight against acne-causing bacteria. I’m a proponent of fixing inflammatory skin conditions with the proper dietary changes, but having blue light to support the healing process is a plus.
I recommend spending extra money on additional features only if you think they’ll help you use the red light device more consistently. Otherwise, don’t get too hung up on them.
Before I commit to spending hundreds or thousands of dollars on a new gadget, I always research the brand I’ll be buying from. Many manufacturers of red light devices (especially those sold on Amazon) have no expertise with red light therapy. Instead, they simply resell or white-label devices manufactured in China, because they’ve realized how big the red light device market is.
I prefer purchasing from brands that focus on red light therapy and have the necessary expertise and desire to manufacture effective products (that they use themselves).
For example, I know the owners of most of the brands I work with, and I have a reasonable understanding of how they operate. We’re good friends with Forrest Smith, who co-founded Kineon, and I know how much passion and resources go into making the Move+ Pro one of the most effective red light devices on the market.
While you might not be able to befriend the creators of your chosen red light device, I encourage you to investigate their story, reach out to ask questions, and read reviews from other customers.
If I don’t know the brand I’d like to purchase from, I often google for terms like “[brand] scam” to see if there have been any reports of other customers who got scammed or taken advantage of.
Unfortunately, the market is flooded with ineffective red light devices. Here are some of the red flags you should look out for before pulling the trigger:
Additionally, make sure your device comes with a limited money-back guarantee so you can test its effectiveness. While some treatments may take several weeks or months (longer than the return window most manufacturers offer), you should be able to get a good feel for whether the device is right for you within the first 30 days.
Red light therapy has become a ubiquitous treatment modality for various health concerns ranging from improving mental health, facilitating hair growth, treating joint pain, speeding up recovery after intense workouts and treating cosmetic skin issues. It’s even been shown to positively influence athletic performance.
As a result, the market for red light devices has exploded over the past few years. Unfortunately, I’ve seen many cheap and ineffective devices being promoted online. That’s why it’s important to understand what factors influence the effectiveness of red light devices for various use cases, including dosing, wavelengths and light intensity.
I hope by reading this article, you’ve equipped yourself with the necessary knowledge to make the right purchasing decision. However, if you have any questions about a device you’re interested in or would like to get my take on it, leave me a comment below.
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