Streamlight Polytac LED YellowThe Streamlight Polytac LED Yellow has C4 LED technology with a 50,000 hour lifetime. It features a borofloat glass lens and an o ring sealed. The tail cap push button provides one handed momentary or constant "on". There are 3 hours of continuous runtime to the 10 percent output level. Adjustable head allows for variable spot to flood focus Borofloat glass lens, o ring sealed Tail cap push button provides one handed momentary or constant "on" 3 hours