1st of all, this ass kissing post should be in Cheers & Jeers, but I'm not gunna do it 'cause most Wolf-Eyes fans will never see it. I've been lurking for so long, I don't know any different, so be patient. The 13V Wolf-Eyes Rattlesnake with the M100 head and bulb be the shiznit. I understand that the 12V bulb is being overdriven with 3 X 18650's @ 3.6V each. Who care's. Beam is white. Spill will light up the room. Hot spot kicks ass. I've used this configuration for over a week. Mostly short off & on. The service from Pacific Tactical Solutions has been excellent. I did order a 3.7v to 13v LED module that only lasted 6 seconds. Mike @ PTS PM'ed me today that I could recieve a new LED module without having to return my original unit. The recent modules have been seen to be defective, so Mike offered to replace my unit in a week when they are back in stock. To avoid any delay on my part, he offered to ship me a 1 mode luxeon module now. Wow, that kind of customer service is way beyond the call of duty, thanks Mike.