Instruct: Classify a given review as either positive or negative.
Query: not very long lasting...

this is an ok light for the price. DO NOT get it wet. mine has been malfunctioning ever since I rode w it in the rain. it will turn on and off at random times, like when I'm not using the bike etc. I've never submerged this light, just exposed it to some rains while commuting. I'd buy a better light and spend some more cash for better safety, durability and longevity. there are much better lights available on amazon or at your local bike shop.