I have been studying weapon lights for a while on CPF and other places and it seems there is a debate about what's best.I own many lights including surefires big handguard 500 lumens light,too much money and to many batteries.I got the olight 500 lumen and the powertac warrior 650 lumen lights.I think the lights are similar the olight is smaller and lighter for weapon mounting,run times are good andwith rrechargeable 18650 batteries they are cheap to run.Construction on both lights are good I would recommend either one.I also bought the klarus xt20 and wow what a powerhouse.I had considered getting a surefire fury but with the lack of a front spring and if can't use the 18650 batteries I didn't feel it had the multiple features I was looking for.