Originally Posted by
noglider
I don't see how you can properly aim a light so intense.
Easy. Just switch from a simple reflector to a projector lens. Same way those super-bright movie projector bulbs have been aimed for decades and the current trend in cars as well. In a car it's like any other projector and behind the lens is nothing more than a parabolic reflector and a piece of metal that shapes the cutoff line. So, instead of projecting an image of Godzilla it projects the cutoff, giving lots of light below the line and very little above. Some cars have a small solenoid that pivots that piece of metal out of the way for the high beams. Beam width is controlled by the specs of the lens. Cars use this technology to control the light from a 3200-3500 lumen (per side) HID light as well as less powerful halogens.
Substitute a LED for the headlight bulb and add on a lever to switch high/low beams (hopefully with a little blue indicator LED to remind the rider their brights are on?) and it could all work just fine on a bike.
Actually, it's cheap enough to buy projector headlight assemblies off ebay and high output LED's... I've got a project idea now.