Our Breakthrough Innovation:
The Firelight® Spectrum

Revolutionizing Heat and Light Therapy

As Seen In

Woman with eyes closed sitting in FireLight Infrared Sauna with lights on

We love traditional saunas, but we don't love the stifling heat or long preheating and session times.

Woman with eyes closed and hair blown behind her

We love the benefits of red light therapy, but most of the devices on the market are focused on the wrong parts of the spectrum, and even contain harmful EMFs which negate the healing effects.

Close up of Hearth Trio Infrared Sauna Panel with lights on

Over Ten Years of R&D

Working on the cutting edge of biophysics, we've taken the best of both worlds and created a red light therapy sauna like no other. We are on a different wavelength, literally.

Imagine a sauna that does more than just make you sweat. The FireLight® Spectrum is where optimized light and infrared heat therapy unite to transform your health from the inside out. We've taken the best of nature and refined it into a simple, effective, and incredibly soothing experience that fits seamlessly into your life.

Firelight® Infrared Light Therapy

The Truth About Red Light

Red LEDs barely scratch the surface. Most saunas just get hot. FireLight® is something else entirely: a revolutionary red & near infrared spectrum designed to restore you from within. Watch how we built the light your body’s been missing.

Firelight® Infrared Heat Therapy

The Sauna Redefined

You’ll sweat like crazy, and love every second of it. No steam. No suffocating heat. Just deep, full-spectrum infrared warmth that feels like sunbathing. No preheat, no wasted time. This is heat therapy, evolved.

The Deepest Healing Experience Under the Sun

Most red light panels and far infrared saunas barely penetrate beyond the surface, absorbed by skin or water before they can reach deeper tissues. FireLight® is different. Its near-infrared wavelengths deliver both light and heat therapy deep into the body, reaching muscle and even organ-level tissue for unmatched healing depth.

Tissue penetration comparison graph of red LED vs  near infrared FireLight vs far infrared emitter Tissue penetration comparison graph of red LED vs  near infrared FireLight vs far infrared emitter

Firelight® Infrared Light Therapy

Light Years Ahead

There are a lot of red light therapy devices out there. But they are not created equal.

In order to understand the power of our Firelight Spectrum®, let's dive into the science of light therapy, otherwise known as photobiomodulation.

Infrared light, just beyond the visible spectrum, is the warmth you feel from the sun. Our bodies are uniquely receptive to red and near-infrared light, which penetrate deeply to energize your cells, reduce inflammation, and boost circulation. It's like harnessing a piece of the sun in every session.

With our Firelight Spectrum®, we take the best of the sun's spectrum, and eliminate the harmful UV and blue light.

Firelight® Infrared Heat Therapy

More Comfortable and Effective

Now that we've talked about light therapy, let's talk about heat. Traditional saunas take forever to heat up. And they feel stifling because they heat the air, not your body. Our FireLight® Spectrum warms you from the inside out, just like the gentle glow of a bonfire. This deep, radiant infrared heat raises your core temperature by three degrees, triggering your body's natural detox and repair processes at the cellular level, all while providing a soothing, invigorating experience without the uncomfortable, stifling heat.

The firelight experience

Light and Heat in Perfect Harmony

When optimized light and heat therapy come together, magic happens. The FireLight® Spectrum blends red and near-infrared light with soothing radiant heat to amplify the benefits of each. This unique synergy accelerates recovery, boosts cellular health, and enhances overall wellness, offering a complete, holistic experience of rejuvenation.
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Dark scene of woman in front of man, each with arms raised in a dance

Understanding the FireLight® Spectrum

The graph below shows what makes our spectrum so special: a precise peak in the most biologically active wavelengths.

Graph of FireLight® Spectrum showing the 'Sweet Spot' of near infrared containing sections of '"Peak Light Therapy' and "Peak Heat Therapy' Graph of FireLight® Spectrum showing the 'Sweet Spot' of near infrared containing sections of '"Peak Light Therapy' and "Peak Heat Therapy'

What Sets FireLight® Apart

FireLight® Sauna stands apart by delivering true full-spectrum infrared, peaking in the near infrared range—the optimal zone for both light therapy and heat therapy. The result is deep, radiant energy that drives detoxification, cellular restoration, and total-body rejuvenation. See how it outshines traditional options in the chart below.

Benefits
FireLight Infrared SuperSauna in Natural Color with lights on and Sauna Stool inside
SaunaSpace infinity logo mark
FireLight® Sauna
Wooden traditional sauna with interior bench and electric hot rocks heater.

Traditional 
Sauna

Far infrared wood cabinet sauna with wooden interior and dark exterior

Far Infrared 
Emitter Sauna

LED red light therapy panel

LED Light

Therapy Panel

Detoxification 3 2 2 1
Healing & Recovery 3 2 2 1
Immune Support 3 2 2 2
Skin Rejuvenation 3 1 1 2
Stress Reduction 3 1 1 1
Better Sleep 3 2 2 1
Pain Relief 3 1 1 2
Emotional Balance 3 2 2 2
Enhanced Cognition 3 2 2 2
Athletic Performance 3 2 2 2
Weight Loss 3 2 2 0
Longevity 3 3 3 0
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More Than a Sauna. A Smarter Ritual.

Beyond powerful light and heat therapy, FireLight® Infrared Sauna excels in the details that matter most. From ease of setup to clean materials and thoughtful design, this chart highlights the features that make our saunas uniquely practical, portable, and built for real life.

Features
FireLight Infrared Sauna - Classic (4 bulbs) in Natural Color with lights on and Sauna Stool inside
SaunaSpace infinity logo mark
FireLight® Sauna

Wooden traditional sauna with interior bench and electric hot rocks heater.

Traditional 
Sauna

Far infrared wood cabinet sauna with wooden interior and dark exterior

Far Infrared 
Emitter Sauna

LED red light therapy panel

LED Light

Therapy Panel

Portable 3 0 1 3
Easy set-up 3 0 0 2
Fast & efficient experience 3 0 0 2
Comfortable 3 1 1 2
Full-body experience 3 3 3 0
EMF shielded 3 0 0 0
Clean, eco-friendly materials 3 2 1 0
No preheating needed 3 0 0 3
Meditative design / feng shui 3 1 1 0
Grounded 3 0 0 0
Made in USA 3 0 0 0
Plug & play (no special outlets) 3 0 1 3
White glove customer care 3 0 0 0
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The FireLight Spectrum Q&A

Can I get a sunburn or tan with FireLight®?

No. Our full-spectrum infrared technology doesn’t include any ultraviolet (UV) light. UV causes a chemical burn in the skin tissue that leads to sunburn. Also, UV causes the skin to produce the melanin pigment that gives the skin a tan look.

How does the FireLight® bulb emit both light and heat therapy at the same time?

Our FireLight® is red and near-infrared light therapy combined with heating infraed. This means deep, rich core heating and mitochondrial stimulation at natural levels of irradiance from a single source.  

FireLight® is full-spectrum infrared experience. The full light emission range is between 550-3000+ nm with no UV. These are all the wavelengths studied for red light therapy (photobiomodulation, 600-1000 nm). Our uniquely deep, efficient and soothing heat comes primarily from about half of the near infrared range 980 - 1500 nm. This is the part of near-infrared that provides radiant heat by being absorbed by our body's water molecules. Our bulb also emits mid-infrared (MIR) 1500 - 3000 nm and far-infrared (FIR) 3000+ nm, which also support the heating process, although MIR and FIR do not penetrate our tissues deeply like near-infrared.

What is the difference between near and far infrared therapy?

Near infrared (NIR) light is in the part of the electromagnetic spectrum that provides light  and heat therapy at the same time. 

Light therapy, also called red light therapy or photomodulation, comes from red light and near infrared light in the range 600-1000 nm. Photons in this light range are absorbed by our mitochondria’s special light receptors and activate many healing and regenerative processes in the cells. Light therapy is essentially a process of photons being converted to elections which activate our biology in an amazing way. 

Heat therapy, also called hyperthermia, is when your cells are heated up somehow and your cells respond with production of heat shock proteins and other heat-induced cellular responses. If we use deeply penetrating near infrared light (980 – 1500 nm) as the heat source, this is called radiant heating, wherein the heat is produced immediately 4-5 inches inside your body because the near infrared light photons go that deep and are absorbed by water in the deep tissues. The near infrared light penetrates deeply to help you heat up and sweat faster.  In contrast, if you are in a hot tub or a traditional sauna, the water or air surrounding your body heats you slowly from the outside inward, in a conductive heating process. 

Far infrared (FIR) light only provides heat therapy, but it is 100% absorbed by the water. And since your body is volumetrically composed of over 99% water, almost all far-infrared photons are absorbed by the water in your skin. This means that FIR saunas effectively function as conductive hyperthermia, and which is a much slower way of heating your body than our FireLight®’s radiant approach.

Is this the same as red light therapy?

Yes. Red light therapy is just one part of the SaunaSpace spectrum. Red light and near infrared light in the range 600-1000 nm stimulate special healing and regenerative cellular processes. So both red light and near infrared in this range deliver light therapy benefits.

The big difference between red and near infrared is that red light is also absorbed by melanin in your skin and hemoglobin in your blood, so red doesn't get into the deep tissues. Red light primarily stimulates the skin tissue.

Near infrared, however, goes into our body much deeper, around 4-5 inches! So near infrared delivers light therapy to our brain, internal organs and all the deep tissues that red light cannot access.

Our FireLight® includes red light and near-infrared light (plus mid-infrared and far-infrared which support the heat therapy). As you can see in the FireLight® Spectrum above on this page, we've designed our light to really focus on near-infrared, because only near-infrared can stimulate light therapy benefits in both the shallow and the deep tissue.

Also, the benefits of our FireLight® technology extend far beyond the capabilities of red light therapy alone, because you also get powerful heat therapy.