Z
z_club556
Guest
Hey guys I just purchased a Olight my first expensive light and is it true that the M20s stay on for 4hrs on high with 18650? Because I was debating between the Olight and the Fenix TK-15 and that has 337 Lumens and it can only stay on for 1:50hrs. Big different in time but not much difference in lumens. Why is there a big difference in time with the same battery? As you can tell I'm still learning about flashlights 
