Works good on my plants.

Excellente qualité. DELs très puissant !

WHAT I LIKE:–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––1) The brightness and intensity of the bulbs. These are brighter than a similar light I bought for a similar price from another buyer.2) The engineering. The light's outer “cage” is designed to dissipate heat. The inner fan provides additional cooling. As a result the light gets very slightly warm, but never hot.3) The price. Similar or identical lights in a different kind of casing can cost hundreds of dollars. This one is affordably priced.–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––I bought both lamps (660 nm and 630 nm) to support my:–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––1) MITOCHONDRIA. As we age, our mitochondria, those little power batteries in our cells, do too. When this happens, they can benefit from a power boost. They love red light, so I'm giving it to 'em, letting the mitochondria in my epidermis soak it up, so they'll keep giving me ATP and other good stuff in return.Not only does the light help to power our mitochondria (think of a rechargeable battery soaking up energy, then being used again), it triggers the creation of NEW mitochondria, i.e., mitochondrial biogenesis.Side note: I like taking CONTRAST SHOWERS: hot/cold/hot/cold. The cold blasts (I end on 3-5 minutes of cold) are also good for mitochondria. I get out of the shower, walk into the living room, and give my skin a blast of red light afterwards…. a one-two punch that leaves me feeling energized when it’s over.–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––2) TESTOSTERONE. As the years go by, men's testosterone starts to decline, leading to a variety of unpleasant health consequences. So I'm starting to do things like this specifically to keep my T levels high.My way of using the lamp for testosterone is to stand with in front of a bank of red lights, with another one shining up on my testicles from a couple of inches below. I stand that way for five or ten minutes, either meditating or listening to a podcast. I've read questions about whether these lights are safe to use near the testicles. As long as they're a couple of inches away, I don't believe there is any danger. They emit very little heat, and the visible wavelengths they give off are helpful, not harmful.–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––3) HAIR REGROWTH. I've been bald for decades. So no great expectations. But it's fun to try different things. So I've been shining this light down on my bald head for 15 minutes a day, to see if it generates any changes. So far (one week in) I’ve seen a few (dark) hairs spring to life on the otherwise bald top of my head. (We're talking VERY few... I count three hairs so far -- compared to the 100,000 healthy hair follicles we have when we're younger.)So... who knows. Obviously no light will bring DEAD hair follicles back to life. But some dormant follicles could be reactivated. I’m using the light in conjunction with vitamin D cream, which some claim will also help support hair regrowth.UPDATE: After using the lights for a couple of weeks, a few hairs dozen grew back, but I found myself still essentially bald on top. Maybe if I'd kept up the red light therapy on the top of my scalp, something more exciting would have happened. But as it is -- nothing much to report. I've moved on.–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––4) NEUROPATHY. I started having pain in a part of my body a few years ago. I spoke with a doctor, who told me it was neuropathy, was a consequence of aging, and nothing could be done about it. So I got used to living with it.When I bought these bulbs, I started bathing this part of my anatomy with red light every day. To my great surprise, the pain has diminished to a point where it's barely noticeable. I'm thinking now that the pain may be totally healed, given time.

Bright yet not glaringly so. I can sleep with it on. Bulletproof radio “Dos n don'ts of Light Hacking” led me here. He says not to use LEDs unless they're a specific wavelength. Red light will not disrupt hormones that regulate your circadian rhythm AKA sleep. White light disturbs mitochondria, as your pineal gland registers blue light as daylight, messes with melatonin.This light works for skin also e.g. scars.Plants: a) probably wouldn't keep it on for too long b/c I think it dries them out. Not an expert, but overnight, dried up the one violet my African violet had going on. I fell asleep with the light on full power, which you're probably not supposed to do.Related to thatB) I fell asleep with the light on and got deeper sleep. So Dave Asprey (bulletproof) might be on point with that. (I used to fall asleep with my full spectrum light on and wake up during the night)For night owls who write or work at night, red lights are a way to keep working without affecting circadian rhythm like blue light. (Circadian rhythm disruption lasts, and has surprising ripple effects)However, for emergency all nighters, red light will allow your circadian rhythm to kick in and make you sleepy around normal sleep time--so for one-time deals I found blue light is necessary to stay awake.C) not sure if the light caused this, but these floundering pussy willow cuttings began growing cattails over a day or two after months of fur bits in seeming arrested development under a higher wattage full spectrum light. (Not sure if it's the red light or me moving the high spectrum light. It seemed to happen overnight when the red light was on, and radical growth, and more than the other one I have under actual sunlight)

This bad boy is INDUSTRIAL GRADE! I am using it for red light therapy---I had hoped to use it like a "wand" in my hand. It's big, and it's heavy--plus, it has these big ridge fins all the way around it, which makes it unfriendly to hand and face alike. That being said, it's still a terrific buy as a therapeutic instrument. I ended up cutting off a tube sock to cover those fins--but still, it needs to sit in something as a stand. So, here is my "light therapy station" at my desk! I have used it three times now---my eyes feel wider and I feel more awake. Maybe the placebo effect? I have a little (gak: wart) on my little finger that refuses to yield to any and all efforts to get it to go. I "treated" it last night with my bulb---today, it is dry and painless--and hopefully taking the hint. I am open to all kinds of treatments and therapies--I learned about red light therapy after a wrinkle-less friend told me about a $1000 red-light-wand she bought at a trade show. Being WAY TOO CHEAP for that, I did my own research and of course, I found what I needed on Amazon. Here quickly---DELIGHTED! AN ADDENDUM: I am using this bulb regularly on my face (wrinkles and spots) and hands (pain relief). The wrinkles??? Still there. I don't know that they're less visible or affected at all by my low-rent red-light therapy. However, there has been a "chocolate milk" like stain on my upper lip for ages. An "age spot" that refused to yield to any and all lightening creams, it is now a thing of the past! I know it's not my imagination, since it has drawn my eye FOR YEARS. I don't think I gave it any more attention than the rest of my face (during my red-light treatments), but it is GONE. That is worth the price of admission right there! I give my face 10-20 minutes once a day.