These lights work great. I bought 10 of the 4-packs and all 40 lights work perfectly fine. They didn't come on at first but keep them in the sunlight for 4-5 hours and mine were on all night. They are quite bright and throw the light temperature sideways. I have installed them on my driveways, and my back patio and around the pool and the effect is amazing. Very elegant yet subtle. My neighbors have already asked me about these lights.The adhesive double sided tapes that come with these lights are of great quality too and very easy to install. They stick instantly and you cannot push the light after it sticks to a surface.I liked them so much that I ordering 10 boxes more (40 lights) to cover other areas around my house perimeter.Excellent choice and no hassle to stick- anywhere you want. Next is putting them on my fence. Will also post pictures when I all done.Solid sturdy quality and look unbreakable!