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Full Spectrum Bulbs
By Dr. Meg Christensen | Updated January 2026
Full spectrum bulbs mimic the sun's balanced wavelengths to support circadian rhythm, energy, and mood throughout the day. These are the best LED and incandescent options with adjustable settings for morning alertness and evening wind-down.
Block Blue Light BioLight Full Spectrum LED Bulb
The BioLight from BlockBlueLight is a full spectrum light bulb that offers circadian support throughout the day with 3 different modes: a low-blue morning setting with a mixture of light at 2100K to softly wake you up, a broad spectrum afternoon setting at 4000K, including blue light that mimics broad sun daylight to keep you alert, and an evening setting at 1800K with zero blue light so you get a good nights sleep. All three settings include a small amount of healthy infrared wavelength. Blue light is actually very important in the morning and afternoon, and is the strongest signal for our entire circadian rhythm, so these features are really important. A few dollars less expensive than the Bon Charge, with a slightly narrower set of 3 wavelengths; otherwise these brands are functionally very similar. 10% off automatically applied through this link.
BON CHARGE Full Spectrum LED Light Bulb
The Full Spectrum Light Bulb from BON CHARGE has 3 settings to support your health throughout the day, at slightly different temperatures than Block Blue Light’s option— 2500K for the morning, 5000K for the afternoon with ample blue light, and 1700K for the evenings with zero blue light. A few dollars more expensive, but offers slightly more exaggerated temperature settings. All three settings include a small amount of healthy infrared wavelength. Both brands are great choices, and choosing between the two may come down to whatever else is on your shopping list, since the rest of each of their stores has slightly different offerings, as well, with BON CHARGE focusing more on red light therapeutics.
Healthlighting Chromalux Full Spectrum Incandescent Bulb
HealthLighting offers more than a dozen different styles of their full spectrum bulb, and all are incandescent! Since these are considered specialty incandescent bulbs, they’re still legal to sell and purchase even after the US banned most standard options in 2023. Chromalux glass is slightly lavender, so you get the full spectrum of light, but with less dulling than the yellow and green wavelengths sometimes add, which feels extra soft on the eyes and produces a beautiful day light glow. They have more natural red and infrared than any LED bulb, which is why so many people love incandescents. Rather than having 3 distinct settings, these bulbs are fully dimmable. Less spendy up front, though incandescent bulbs don’t last as long as LEDs do. 10% off with discount code INTMEDICINE10.
Philips Hue Full Spectrum White Light Smart LED Bulb
Also listed on the Amber Lighting page, these Philips LED bulbs are an impressive feat of LED technology— they range from 1000K to 20,000K — the warmest of warm temperatures to near perfect sunlight mimicking. You can adjust their brightness as well. The most expensive of the bunch, these are smart bulbs that you control with an app and fine-tune down to the perfect wavelengths and brightness profiles for you. Available on Amazon, too.
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More About Full Spectrum Bulbs
What is full spectrum light?
The sun emits full spectrum light, and certain light bulb types get closer than others at mimicking this. There is some disagreement about exactly what the definition of a full spectrum bulb is:
Some consider only reptile lamps full spectrum light bulbs, because they emit the visible spectrum of light, as well as infrared, UVA and UVB wavelengths.
Some consider an LED light bulb with a full, balanced spectrum of visible light (without the UV rays) “full spectrum.”
Others consider only specialilzed LED light bulbs with the visible spectrum and infrared light “full spectrum.”
Some consider incandescent lights, which naturally include the visible spectrum in broarder wavelengths than most LEDs “full spectrum” because they also naturally have a small amount of infrared light.
It general, all full spectrum bulbs emit more wavelengths of light across the entire visible (and sometimes infrared and UV) spectrum than standard LED, CFL, or fluorescent bulbs. Here’s a little reminder of what the full spectrum of light looks like:
Image Source: HealthLighting.com
Are incandescent bulbs full spectrum bulbs?
Yes, incandescent light bulbs naturally emit a very broad, smooth set of wavelengths to the sun in the evening.
“Warm” incandescent bulbs heat their filament to emit a spectrum of wavelengths more like the sun during sunset.
“Cool” incandescent bulbs heat their filament to look slightly more like daytime sun.
Special coatings and colors of bulb glass can also bring out more blue, making incandescent bulbs feel more like natural daylight sun.
All still have a smoother curve of broader wavelengths with more yellow, red, and infrared than any standard LED bulb.
What are full spectrum LED bulbs?
Full spectrum LED lights are a major improvement over standard ones, as their wavelengths are more evenly spread to mimic sunlight better, and some varieties include infrared wavelengths.
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