FireLight Infrared Bulb (B-Grade)
Processing time is an estimate of time between your order being placed and your product being shipped.

Splitit helps consumers use their existing credit card to turn purchases into smaller, monthly payments.
The full amount of your purchase is authorized (held) on your credit card to guarantee future payments so you need to have at least that amount in available credit on your card.
The authorization amount reduces with each monthly payment you make until the balance is cleared and we renew these authorizations periodically. The previous authorization is removed as soon as we receive a new one.
For more info, Contact Splitit SupportYou can choose this option at checkout.
SKU: BT00120000B UPC: 810018190002



Experience infrared therapy the way nature intended with our proprietary FireLight® bulbs (formerly known as ThermaLight®). We spent years perfecting a spectrum that delivers near, mid, and far infrared, plus red light just like the sun—but with none of the harmful UV.
The bottom line: you get the best heat and light therapy in less time. Sweat faster, feel better.
- No harmful UV light
- No blue light
- No flicker stress
- No mercury, no toxic materials, no paints, no coatings
- Delivers 2–4x more red and near infrared wavelengths than competitors
- High-frequency hard quartz glass
Note: Each stained glass bulb is unique and may have slight color variations that in no way affect performance. Each bulb goes through a strict quality control process to ensure your satisfaction.
*Two-year warranty applies to FireLight® Bulbs used as intended in SaunaSpace products. For all other uses, warranty is limited to one year. When you make a warranty claim, SaunaSpace may ask for proof of purchase of accompanying SaunaSpace products before processing the claim.

Weight
3.2 oz (91 g)
Dimensions
Bulb diameter: 4.9 in (125 mm)
Stem diameter: 1.7 in (42 mm)
Bulb height: 6.6 in (168 mm)
General specifications
Bulb type: R40
Socket type: E26
Base type: screw-in
Glass color: dark red
Coating/finish: none
Filament: C-9
Rated life: 5,000 hours
Bulb material: hard glass
Product technology: Incandescent
Glass processing: tempered, annealed
Glass production method: mouth-blown, hand-rolled
Cap-base material: brass
Electrical info
Wattage: 250 W
Input voltage and frequency: 120V at 50–60 Hz1, 240 V at 50–60Hz2
1120V is used in USA, Canada, Mexico, Japan and other select countries.
2240V is used in Europe, Asia, South America, and Australia/New Zealand, and most of the rest of the world.
Don't know which voltage to select? Learn which is correct for you in our Help Center.
Operating specifications
Max operating temperature: 570 °F (299 °C)
Intensity: 1400 W/m2 at 1 ft (305 mm)
Lamp fixture: intended for use only in a lamp fixture rated for minimum 250 W*
*use in a lamp fixture not meeting the wattage rating requirement voids the warranty. Learn more about our FireLight® warranty.
Approvals
CE-certified
RoHS-certified
SKU:
UPC:


No One Does Infrared Like Us
We’ve spent years crafting the perfect hand-blown sauna bulb. We mimic the best of the sun—with none of the harmful UV—to create full-spectrum infrared therapy that is truly one of a kind.
See How it Works- PBPeter B.Verified BuyerI recommend this productRated 5 out of 5 stars2 hours agoThe best!
Bought two of your bulbs and two inexpensive infrared bulbs from Walmart for my DIY sauna. I can feel and see the difference. There is no doubt that your bulbs are superior and worth every dollar. I will be buying more in the near future. Thank you for making my DIY sauna feel heavenly.
Was this helpful? - DFDK for a.Verified BuyerI recommend this productRated 5 out of 5 starsYesterdayNo more research needed
I am so glad I purchased a set of 4 "B" grade bulbs.for my home built sauna. They are A+ grade in my book. One bulb died shortly after purchase and was quickly replaced. Every contact with the company is met with a friendly response. The staff appear as passionate about the products as I have become.
Was this helpful? - NHNancy H.Verified BuyerI recommend this productRated 5 out of 5 stars1 week agoThe Best Infrared
I have been using sauna space bulbs for a few years and I love them! My sauna is the thing I miss most when we travel. I do love the sweaty detox, but even more than that I love how the infrared light helps me feel happy, especially on those cold, foggy days it can feel like a real high especially when followed by a cold shower!! My husband and I also have a beautiful, super expensive, wooden full spectrum red light sauna from one of the major companies and it’s nice, but I definitely prefer the feel I get from my sauna space sauna. When I have been using my sauna space consistently people tell that my skin glows. If I work my muscles too hard if I sauna afterwards it really cuts down on the soreness.
I also like to keep a bulb near my computer in the morning to counter the blue light.
The bulbs are kind of a no-brainer to counter life in the modern world.
Was this helpful? - AGAlfonso G.Verified BuyerI recommend this productRated 5 out of 5 stars1 month agoBuena compra,
Compre unas lámparas infrarrojas, a muy buen precio, de muy buena calidad. Recibi Atencion exelente, entrega rápida y seguimiento. Muchas gracias y congratulaciones
Was this helpful? - DPDouglas P.Verified BuyerI recommend this productRated 5 out of 5 stars2 months agoWorth It
I have been curious about the Firelight Bulbs but the price made me hesitate. I was one of the first to demonstrate with photos how I retrofitted a FIR sauna with a 4 panel SaunaSpace back in 2016. Twice I have replaced the original bulbs with a competitors and haven't really noticed any difference. When I saw the Grade B Firelight bulbs were 30 percent off I bought 4 for my panel. I am a numbers person and preheat the sauna to 145 degrees. Turn the NIR off and turn the SaunaSpace panel on. Here are the differences:
Competitor Bulb:
Walk in temperature is 145 degrees. Turn FIR off and SaunaSpace panel on.
Ten minutes later temperature is down to 135 degrees.
Time to rolling sweat is 15 minutes.
FireLight Bulb:
Walk in temperature is 145 degrees (same procedure as above).
Ten minutes later temperatue is 142 degrees.
Time to rolling sweat 4 minutes, but actually sweating at 2 minutes.
My experience is the FireLight bulbs are noticeably more intense, hotter and I get to sweating (which is the goal) much quicker. No sitting and waiting.
I cannot compare these to Grade A Firelight bulbs , but Grade B apparently are cosmetically and tested to be as good. My experience is they are far better then what I have used in the past and worth the price.
Was this helpful?
Customer support hours (CST):
9am - 5pm, Monday - Friday
- Choosing a selection results in a full page refresh.
- Opens in a new window.