Calculations suggest you’d have to have your eyes less than a foot from it. 2 It claims 10,000 lux, but-like nearly all commercial products-does not say at what distance. The best-selling SAD light on Amazon is brighter than many, at about 3,000 lumens. (So the “10,000 lux” claim skates close to false advertising.) Most light boxes produce 3,000 lumens or less with that brightness, you won’t get 10,000 lux unless you put the lamp a few inches from your eyes. How much light you get depends on how bright the lamp is and how much of it is aimed in your direction and how far from it you are. Lumens measure how bright a lamp itself is-how much light it produces. At a realistic distance, most light boxes deliver around 2,000 lux-the same as a gloomy overcast sky in winter. The further you are from a lamp, the less light you get.
A claim of lux, by itself, is meaningless, because it depends on how close you are. In contrast, most commercial SAD light boxes claim 10,000 lux, but provide much less in practice. 1 LED lamps can be much brighter than fluorescents, so you can get well over 10,000 lux. My personal experience is that much more than 10,000 is better. Most SAD light therapy research was done with 10,000 lux, because that was the brightest that was practical using fluorescent bulbs, which were the best lighting technology available at the time. Bright light phototherapy is definitely proven to improve SAD symptoms, but some details are unclear-including how much light is optimal. I summarized some of that research in a previous post on LED SAD lights. I say seems because research so far has not fully explained how seasonal depression works, nor how best to treat it. SAD seems to be largely caused by getting less light in winter, so getting a decent fraction of 100,000 lux seems ideal. The sun at noon on a cloudless day in summer provides about 100,000 lux an overcast day in winter is about 2,000 lux. Twitter thread about installing it ending here. I’ve used it heavily for more than a year and it’s been trouble-free. It runs on regular 110 volt wall electricity, so you don’t need a separate power supply, unlike the light bars discussed below. It produces 48,000 lumens, which is enough to make a whole medium-sized room bright. It’s $200 on Amazon as of November, 2021. I have been using this stadium light for the past year. Currently, rather than light bars, I would recommend LED panels used for warehouse and outdoor lighting. With easy drop-in installation and so much illumination on tap, we would be remiss if we didn’t point out this stellar alternative option on our list of the best ATV LED light bar options.Update, 2021: LED lighting options have continued to improve. Just as important, XenonPro LEDs are built to last, with durable heat-sinking solid aluminum casings and built-in turbofans to manage temperatures and give you up to 45,000 hours of service life. Delivering up to 9000 lumens in as many as 7 different colors, XenonPro’s LED bulbs allow you to select exactly the right lighting option for your needs, and they throw significantly more illumination at the trail than your typical factory bulb, giving you the confidence you need to keep riding after the sun dips. In this arena, XenonPro is king, offering drop-in replacement LED bulbs in over 40 of the most common automotive headlamp and fog light sizes so that no matter what you ride, you can probably find a XenonPro headlight conversion kit to fit. Light bars are terrific, but let’s not forget: there is plenty you can do to beef up your ATV’s existing lighting, like replacing your mediocre factory headlamp bulbs with some good LEDs.
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