Why Infrared Light Therapy?

Near Infrared

Near infrared (NIR) is the shortest infrared wavelength and penetrates the skin’s surface more effectively than the other two. Scientific research shows that when delivered at the vital wavelength of 880nm without extreme heat or light, NIR promotes skin renewalcell healthwound healing, and tissue growth.

NIR heaters consisting of high-wattage halogen bulbs at extremely high temperatures are not comfortable or beneficial. In order to make NIR heat safe for saunas, we used NASA research to develop a patented LED array that provides NIR at a singular wavelength with minimal variability and virtually undetectable heat and light.

LEDs are effective because they can trigger a natural photo-biochemical reaction (similar to how plants use chlorophyll to convert sunlight into plant tissue). Research from Dr. Harry Whelan, it takes a specific joule of NIR energy to deliver the wavelength needed to penetrate human tissue.

Learn More About Sunlighten Advanced Near Infrared LEDs

Mid Infrared

Mid infrared (MIR) is a longer wavelength that can penetrate deeper into the body’s soft tissue where inflammation occurs. MIR helps expand blood vessels and increases circulation, so more oxygen can reach injured areas of the body. This reduces pain and speeds the healing process. View 3-in-1 study on pain relief.

To produce MIR, sauna heaters must be able to maintain a surface temperature of 250⁰C. Though many sauna companies claim to provide full spectrum, the polypropylene material used in their heaters actually melts at the high temperature required for MIR. We worked with engineers and scientists to overcome this obstacle by using a higher quality product – DuPont’s Kapton® polyimide film—a high tech material made to tolerate the high heat required to produce MIR. Plus, since our full spectrum heaters are made up of three distinct heating elements, the MIR layer can be heated independently to a higher temperature than the FIR layer.

Far Infrared

The longest wavelength, far infrared (FIR), reaches deepest into the body, where toxins are stored. By raising your core body temperature, FIR stimulates the sweat glands, resulting in a deep, detoxifying sweat that leaves you feeling revitalized. Plus, since sweating increases heart rate, cardiac output, and metabolic rate, you’re also burning calories.

We already achieved the most effective far infrared heater with our highly emissive Solocarbon heater coating . We’ve applied that same coating to our polyimide panel and discovered this application makes it 99% emissive! This is why Solocarbon panels are the only far infrared heaters clinically shown to raise core body temperature nearly 3° for the most detoxifying sweat, lower systolic and diastolic blood pressure and aid in weight loss.


The Active Ingredient for the Highest Quality Infrared

To deliver health benefits like reduced blood pressure, weight loss, and detoxification, saunas need to emit high concentrations of infrared waves—not just heat.

That’s why Sunlighten worked with chemistry and coatings expert Dr. Ronald Lewarchik to develop its patented Solocarbon heating panels. The active ingredient in these panels is a special coating that emits the highest quality and quantity of infrared heat available from any sauna on the market.

The Proof is in the Process

Our patented heater design is our special sauce. Solocarbon panels are made up of three separate layers that are sandwiched together and cured at 320°F resulting in a nearly perfect black body. This unique process makes our far infrared heaters 99% emissive, safe, and effective. In fact, the materials used in our highly emissive coating are FDA approved which ensures that it is non-toxic. It is also a more efficient heat source and consumes less energy.

Patent US8737827B2


Solocarbon Heaters: A Perfect Equation for Vitality

Large Surface Area + High Emissivity + High IR Power = Therapeutic Results.

Total Surface Area

Far infrared waves have a regenerative effect on the body when emitted in the vital range of 7-14 microns. According to Wein’s Law, infrared energy at a lower surface temperature peaks in this vital range. The design of a Solocarbon heater allows for most of the far infrared wavelength to be near 9.4 microns, which is the level at which the human body absorbs infrared energy.

This is also the frequency at which a water molecule resonates or vibrates. This vibration causes a release of cellular toxins. This optimal micron output also allows for deeper penetration of far infrared heat, which improves pain relief, detoxification, weight loss, and skin purification. Our Solocarbon heaters maintain a constant, lower temperature that’s optimal for far infrared therapy. Heaters with larger surface areas create a more even distribution of heat so your sauna experience is both comfortable and therapeutic.


Emissivity is the ability of an object to emit or absorb energy. A perfect black body has an emissivity of 1, emitting 100% of infrared energy. An object with an emissivity of 0.6 will absorb 60% and reflect 40% of the energy. For infrared therapy to be successful, sauna heaters must have a high emissivity level to deliver a high concentration of infrared waves. As your body absorbs high levels of infrared, it begins to heal at the cellular level. Without high emissivity, a sauna may produce heat, but it won’t provide healing infrared. Sunlighten Solocarbon FIR heaters are clinically proven to be 95% emissive.

Infrared Power

Infrared power is a measure of the concentration of energy (wattage density) and a prime indicator of heater quality. Heaters with higher wattage more effectively deliver infrared across the entire spectrum. Infrared heaters have different outputs based on their wattage density and placement in the sauna. Solocarbon heaters are designed to emit the optimal amount of far infrared and are located in optimal positions within the sauna.


Clinically Backed for Quality & Safety

Our patented design and process are why Solocarbon panels are the only far infrared heaters clinically shown to raise core body temperature nearly 3° degrees for the most detoxifying sweat, lower systolic and diastolic blood pressure and aid in weight loss.

Not only are Solocarbon heaters the most effective on the market, they are also the safest. Our heater design produces virtually no EMF. With our exclusive manufacturing process, we can cancel out EMF to levels practically undetectable. Solocarbon heaters have gone through comprehensive third-party testing to ensure safe levels of EMF.

All heaters must be covered as a standard safety hazard precaution. Sunlighten provides non-toxic and highly emissive carbonized bamboo as a protective cover on our Solocarbon® heating technology, having our customer’s ultimate comfort & safety in mind! .

mPulse Believe

2 person sauna

The world’s FIRST and ONLY 3-in-1 full spectrum infrared sauna – available exclusively from Sunlighten – allows you to take charge of your health with:

Near, mid and far infrared heaters, proven 99% effective
7 wellness programs at your finger tips
Android-powered with smart features on 10.1" tablet
Chromotherapy: Healing with lights and colorsm
Acoustic Resonance Sound Therapy, a must-have add-on
Available in Basswood, Eucalyptus & Euca/Cedar (Eucalyptus Exterior / Cedar Interior)

mPulse Believe Specifications

Exterior: 51.7” x 47.6” x 78.5”*
*includes 2″ feet
Interior: 45.9” x 41.6” x 71.5”
Bench: 45.9″ x 21.7″ x 20.2″

Heaters: 6 FIR, 5 MIR, 4 NIR
*No floor heater in eucalyptus models

Screenshot at Dec 04 23-00-38