Experience varies. I bought a 1000 lm off of Amazon for $50 that has 3 o-rings, magnetic switch, and a tempered glass lens. I liked it so much, I bought 4 more off eBay for $25 each. They've all been to 250 ft (75 m) numerous times and are simply awesome.Just avoid cheap Chinese crap. It breaks, is unreliable, melts, poor quality…