Check out
www.candlepowerforums.com for serious lighting concerns.
I went there and asked them about the best LED flashlights to use with the
TwoFish Lockblocks mount... and everybody consistently said the
Fenix L2D Q5 was the best around... they said two of them for a low and high beam are unbeatable, and I believe them... but one flashlight is good enough for me. It doesn't have focus capabilities, but the beam is a bright white, and the spill is very wide and still pretty bright.
For running 2+ hrs at consistently the same regulated output on only 2-AAs, being waterproof, so compact, no wiring necessary, not degrading the quality of the spark or robbing the engine of power, being able to detach and reattach the flashlight within a second or two, etc... I don't see why people still try to run a light off the white wire.
If you understand optics and figure out how to control the beam to your liking, I'm sure we'd all love to hear your solution. But if you wanna try the L2D Q5 light with the Lockblocks mount...
www.4sevens.com has an 8% discount if you use the CPF8 code at checkout. They also have free shipping to anywhere in the world.
I tried the Coast P7, and did love it's ability to easily focus and the SUPER long battery life off of 4-AAAs... but you could nearly buy two L2D Q5s for the same price, and the Coast P7 isn't regulated, so the output consistently diminishes over time. The beam pattern is what was coolest on the P7... it was pretty large & solid all around, but there wasn't really "spill", nor was it as wide of an overall beam as the L2D Q5. You can clearly choose either one and be happy with them as flashlights and MB headlights... but two L2D Q5s would be better than just one P7 any day, and one L2D Q5 should be good enough for anybody.