Well, After ZERO thought, I ordered these, They arrived quickly, They all three worked, Green my most fave so far, I am a complete noob here and this is my first post. so please be gentle.. haha, I am however quite mechanically and electronically inclined.. I decided to u-tube a few mods(this all sparked from dad ( or tim the toolman).. Why settle when you can give it more POWER) first I tubed the pot mod. nix that idea, no mods to be made here!! destroyed the violet (don't quite know the nm's yet) So if anyone was thinking of hacking these guys you'd better be an engineer or wait for one on here to dissect one.. I can send you the guts if you want them.. no charge, well, cept for shipping. Bottom line, 20+ bucks and a couple of batteries are the gateway to my new drug...lasers... I am already a candlepower forum flashoholic, so why not right? so many 18650's and not enough darkness... wha wha wha, the devil has infected me once again.. HID's led's pcb's ... this is all a dream this is all a dream..... For the price these lasers are def neat, I just need 10 more jiggawatts..