Are there any bike lights using projector lens optics like you see used with many automotive xenon HID headlights? I'm not sure if LED lighting is really compatible with or would benefit from projector optics with cutoff shield or not. But I've been a fan for many year now of projector HID lighting with a sharp cutoff, as it yields excellent light throw and dispersal width, while preventing the light and glare from blinding oncoming drivers.
As I said I'm not sure if LED lights would really work with a cutoff shield or not, since LED light is much more directional already, while a halogen or HID capsule throws out light all around and needs the parabolic reflector, cutoff shield, and convex lens to help focus that light. However looking at some of the bike lighting in here lately, some of it seems over the top such that it might actually blind oncoming traffic. On a dark 2-land road that could be pretty dangerous. Not sure if there's a way for an LED array to be made such that it throws light only downward (below horizontal) and to the sides, as opposed to equally all around in all directions, including up.
I'm just thinking that a beam pattern like this would be pretty cool to have on a bike. This is my Integra with retrofitted Hella bi-xenon HID projectors, same as those used in Mercedes E-class and late model Nissan Maxima cars: