I am a totally new in the world of flashlights. I have a mag 2d, a princeton blast and some keychains LED. I plan to buy a new flashlight that has to be THE flashlight! first i thought the SF L1 would be the best. I think i need more lumens though. L4 seems to be just perfect besides it doesnt have any low-beam. The U2 seems to be the light I am looking for. I am afraid the beam is too tight though. i want a beam like the L4, a wide smooth spot and a lot of spill light. Does anyone know about the U2 beam? is it possible to put a L4 bezel on a u2 Body? how does the beamshapers work? which lumens are possible with the U2, 2 and 1oo i know. are all lumen-steps regulated?