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B-Grade ThermaLight Infrared Bulb

Regular price $24 USD
Regular price $95 USD Sale price $24 USD
B-Grade ThermaLight Infrared Bulb
Regular price $24 USD
Regular price $95 USD Sale price $24 USD
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SKU: BT00120000B    UPC:

Save 75% on a replacement bulb for your Tungsten or Photon panels. B-Graded for visual defects in the glass, but provides the same light and heat therapy benefits as the standard ThermaLight® bulbs.

Product not covered under SaunaSpace warranty and not available for return. All Sales Final.

Available While Supplies Last

Experience infrared therapy the way nature intended with our proprietary ThermaLight® bulbs. 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
  • Delivers 2–4x more red and near infrared wavelengths than competitors
  • Mouth-blown stained glass made using ancient techniques


3.2 oz (91 g)


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 FAQ.

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 ThermaLight® warranty.





Thermalight bulb

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.

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