I get some of these and they work great, then others and they won't even turn on, but if they don't turn on the company is really understanding, and they will replace or refund. I love these when they do work, and you can't beat the price. I put them up with a bit of masking tape, THEY ARE GREAT. I have really REALLY sensitive eyes, even just plain daylight is too much for them, fluorescent? Forget it, I use these to keep my apartment lit, I live in a studio so it's easy, and to be able to control them from my phone is SO excellent, but either way, they are a good company, and they help you out if they don't work, so it's worth it to buy them I think, I have quality a lower mark, because sometimes you don't know if they will work! But the company works with you! So you can buy more and likely they will