SaunaSpace FireLight Red and Infrared Therapy Bulb – deep red-tinted glass bulb photographed from an angled top-down view, showcasing its smooth, rounded design and radiant finish.

FireLight Infrared Bulb (B-Grade)

4.9
Rated 4.9 out of 5 stars
13 Reviews

This item is B-Grade. This means it has not been used but has minor cosmetic flaws like bubbles and minor color variances in the stained glass. They have the same irradiance levels and spectral output of our A-Grade FireLight® Bulbs.

This item is final sale and cannot be returned, but it is eligible for our standard warranty.

Born from over a decade of research and development, the FireLight® Bulb is the heartbeat of everything we offer. It delivers optimized red and infrared light—concentrated in the near-infrared range and extending into mid and far—for unmatched light and heat therapy. With zero EMFs, no flicker, and no blue light, this hand-blown bulb supports detox, circulation, cellular repair, and calm. Elemental light, biologically tuned for deep transformation.

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120V USA
Sale price $165 Regular price $240

Free shipping in US & CA from $200

Sale price $14/mo Regular price $20/mo

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Sale price $165 Regular price $240

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SaunaSpace FireLight Red and Infrared Therapy Bulb – deep red-tinted glass bulb photographed from an angled top-down view, showcasing its smooth, rounded design and radiant finish.

FireLight Infrared Bulb (B-Grade)

Sale price $165 Regular price $240
Free shipping in US & CA from $200

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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13 Reviews from Happy Customers

4.9
Rated 4.9 out of 5 stars
Based on 13 reviews
Total 5 star reviews: 12 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
13 reviews
  • DK
    Dennis K.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    9 months ago
    Still Very Effective!

    You honestly can’t tell it’s B Grade. These lights are wonderful! This is used daily in our home. Thank you for providing such quality at a discount!

  • PB
    Peter B.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    10 months ago
    The 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.

  • NH
    Nancy H.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    10 months ago
    The 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.

  • TZ
    Tom Z.
    Verified Buyer
    I recommend this product
    Benefits I Notice Detox, Radiant Skin, Less Inflammation, More Energy, Improved Mental Health/Mood
    My Favorite Features Quick Sweating, USA-Handcrafted Quality, Combining Light & Heat Therapy, Convenience of Sauna at Home, Nature’s FireLight Spectrum Indoors
    Age 60-69
    Rated 5 out of 5 stars
    3 days ago
    Infrared bulbs

    These sauna bulbs are the best! I already had my own panel and sauna, so I needed the new bulbs. These are awesome! Even the "B" bulbs are great, no problem! Thanks for the quality products!

    QualityRated 2.0 on a scale of minus 2 to 2
    Ease of SetupRated 2.0 on a scale of minus 2 to 2
    I Use ItRated 0.0 on a scale of minus 2 to 2
    ExpectationsRated 2.0 on a scale of minus 2 to 2
  • CH
    cynthia h.
    Verified Buyer
    I recommend this product
    Benefits I Notice Stress Reduction
    My Favorite Features Quick Sweating, Convenience of Sauna at Home
    Age 50-59
    Rated 5 out of 5 stars
    3 months ago
    Love my sauna space !!!

    I had bought a replacement bulb only because my firelight knocked over. I’m back in business, can’t live without my units. I’ve seen such a difference in my skin. My acne is drying up and the healing time is so quick. I love my relaxation routine. Thank you for such amazing products! My pets are in love too!

    QualityRated 2.0 on a scale of minus 2 to 2
    Ease of SetupRated 2.0 on a scale of minus 2 to 2
    I Use ItRated 2.0 on a scale of minus 2 to 2
    ExpectationsRated 0.0 on a scale of minus 2 to 2