Is the Stylus Pro the new 45 Lumen model ? If so it has an upgraded switch . Mine was the earlier model , switch failed , and pocket clip broke . They would have fixed it under warranty , but i had already tossed it . By way of contrast , a Microstream I gave a former co worker has had the snot beat out of it for about 3.5 years , still going strong .Chris
I haven't seen 4sevens mentioned is there a reason why? I hope there good cause I love their lights. I've dealt with them once. I called about dropping my quark and it wouldn't work. They gave me all info to return it but then the guy said before you send it you might want to try wiping the head out and the o-ring off. I thought that won't work but I'll try. By goodness it worked. My light is still going strong to this day. I love 4sevens lights.