Well, read the reviews from most of the owners on this forum (and the electronics subforum) and you'll see that the 5-star reviews are a lot closer to the truth. As said, Ive got 5-6 CREE lights, and they are all bulletproof. (Ok I dont ride in the rain or snow with them but apart from that, they've been perfect, which is actually a bit surprising given that they're all inexpensive ones from China.)