Would a red headlight at night would work better then using a white one? Red light is better at preserving night vision, so would this mean that a red light + better night vision, is superior to an equally powered white light with not as good night vision? To clarify things, I am thinking mainly in the context of rural roads, and trail riding. (Night vision is hard to preserve in an urban nighttime environments).
Other then home brewed projects, the only light I know of that could be a candidate for such an experiment would be the new Dinotte 400L rear tail light.
What about amber or cyan lights?