Surefire - makes flashlights that produce in excess of 800 Lumens and they project well enough to identify a man in camouflage at 500 meters - and more. They are rugged enough to withstand the recoil of any automatic weapon made - M2, M240, 25MM canon, etc. The reflectors are designed and set at the factory and are pre-focused. The technology is there.
I recently purchased a set of the new PIAA LED driving Lights and they are both bright and illuminate fairly well. They could be better however. The LED is mounted on a cross bar and is directed into the reflector.
"For those who fight for it life has a flavor the protected never know."
USMC 65-68 RVN 66-67