As Seen In

Gentle & Effective
Experience deep, penetrating warmth—without the suffocating heat of traditional saunas.
Innovative Spectrum
FireLight® mimics the sun’s spectrum—concentrated in the most healing infrared wavelengths, without the damaging rays.
Long-Lasting Performance
Engineered to last up to 5,000 hours with a 5-year warranty, these bulbs are a lasting investment in your health.
The FireLight® Spectrum: A Revolution in Heat and Light Therapy
The FireLight® Spectrum blends red and near-infrared light in the body’s most responsive range. It fuels energy, activates detox, and restores balance at the cellular level. This isn’t surface sweat. It’s deep, biological renewal.



FireLight: Key Features
- Delivers 2-4x more red and near infrared wavelengths than competitors
- Hight-Frequency Hard Quartz
- Deep Red Stained, No Toxic Coatings
- Zero Mercury
- Zero plastics
- Extremely long-lasting, 5,000 hour rating
- 5-year warranty
- 120 and 240 volt options (worldwide compatibility)
Limitless Benefits
293 Reviews from Happy Customers
The FireLight® Infrared Therapy Bulb FAQ
Have questions about the FireLight® Infrared Bulb? You’re not alone. Beneath its ruby glow lies a story of near infrared therapy, quartz glass brilliance, and radiant healing—refined through years of listening, learning, and luminous transformation. These answers aren’t just technical notes; they’re signposts on your red light wellness journey. Whether you’re curious about photobiomodulation, tungsten filament design, or simply the magic behind the glow, this is your space to explore. Let the questions illuminate. Let the answers warm you.
What makes the FireLight® Bulb so special?
The FireLight® Infrared Therapy Bulb isn’t just another red light—it’s the core of everything we create at SaunaSpace. Designed for therapeutic brilliance, it emits a powerful spectrum of red and near-infrared light (600–1000nm), perfect for cellular renewal, detoxification, and energy revitalization.
Crafted from red-stained hard quartz glass, it’s free of coatings, chemicals, and compromise. Inside, a high-Kelvin tungsten filament burns bright, offering deep radiant heat and targeted photobiomodulation. Every bulb is tested twice—once under thermal shock—to meet a higher standard of integrity and healing light.
How much heat does the FireLight® Bulb produce?
At 250 watts, the FireLight® Bulb runs hot—intentionally so. Surface temperatures can reach 300ºF (150ºC), delivering the penetrating warmth that makes near infrared therapy so transformative.
Used in our Glow and Hearth, this heat is safely contained within shielded ceramic sockets and protective stainless steel bulb guards. Avoid touching the glass during use.
Is it safe to keep my eyes open while using the bulb?
Yes, as long as you’re not staring directly at the filament. Many users relax, read, or work under its glow with eyes open or softly closed. Direct eye contact isn’t required—your cells still receive the benefits of red light and near infrared wavelengths. Trust your body’s signals and avoid any exposure that feels uncomfortable.
Can I use this bulb in a standard lamp or DIY setup?
It’s not recommended. The FireLight® Bulb requires a special fixture for humans: one that’s grounded, EMF-shielded, and built to withstand high heat output. Conventional lamps and sockets often fall short, increasing risk of EMFs, burns, or fire.
That’s why we've engineered our Glow Light and Hearth Sauna Panel for safety and performance. Pairing your bulb with its intended purpose-built home ensures optimal therapy and peace of mind.
What’s the best way to know when a FireLight® Bulb is ready to be replaced?
It’s refreshingly straightforward. If it still lights up, it’s delivering full-spectrum power. When it no longer turns on, it’s done. Unlike LEDs that fade over time, the FireLight® Bulb shines bright until its final moment.
How long will my FireLight® Bulb last?
With a 5,000-hour lifespan, most bulbs last 5 to 10 years depending on frequency of use. They maintain full brightness throughout their life. If purchased with a SaunaSpace product (Glow, Hearth, FireLight® Sauna, Shower Sauna Conversion Kit), your bulb is covered under our five-year warranty and eligible for discounted replacements afterward.
Does the bulb emit EMFs?
The bulb itself emits a minor electric field—typical of incandescent technology. For full protection, we recommend using it exclusively with our Glow, Hearth and FireLight® Sauna. Each is designed with built-in Faraday shielding to neutralize electric fields at the source.
Can I benefit from this bulb outside of a sauna?
Absolutely. The Glow and Hearth units bring FireLight® therapy into everyday settings—offices, bedrooms, meditation corners. Even without the sweat of a full sauna session, you’ll still receive rich red light, warmth, and mitochondrial support.
Is this a full-spectrum bulb?
Yes. The FireLight® Bulb delivers a broad therapeutic range of red and near-infrared wavelengths, unlike narrow-band LED devices. This allows for holistic rejuvenation, from muscle repair and detox to cellular energy production.
Is it safe to touch the FireLight® Bulb?
Not while it’s on or recently used. Even when cool, avoid touching the glass. Oils from your skin can create hot spots that may weaken the bulb over time. If touched, gently wipe it with rubbing alcohol and a microfiber cloth before turning it on.
What happens if water splashes on the bulb?
Each bulb is splash-tested during production to reveal hidden flaws. It can handle small, accidental spritzes of water, but it’s not meant for use in steam rooms or wet environments. Keep it dry to preserve integrity.
Can I use a dimmer with this bulb?
Technically, yes—but it’s not optimal. Dimmed output shifts the spectrum and reduces therapeutic benefit. For lower-intensity sessions, turn off one or more bulbs in the FireLight® Sauna. Our Glow and Hearth allow intuitive, flexible use outside of the sauna by simply adjusting your distance from the light.
Is the FireLight® Bulb safe for children and pets?
We don’t just test—we test twice. Each bulb is powered on and splash-tested at our partner facility, then again at our headquarters in Missouri.
From performance and consistency to physical integrity, we inspect every detail before it earns the FireLight® name. Only the best bulbs—those that glow with strength and safety—make it to your hands.
Discover Our Full Spectrum of Products
-
Infrared Sauna
FireLight Infrared Sauna
Sale price from $4,246 Regular price$4,995 -
Infrared Sauna Panel
Hearth Infrared Sauna Panel
Sale price from $1,271 Regular price$1,495 -
Infrared Therapy Light
Glow Infrared Therapy Light
Sale price $591 Regular price$695