actually, just putting a red tinted lens on a white led doesn't work well at all. They are just too white.
I want to run my super dyno taillight and headlight at the same time. I'm using a red LED.
There are some reasonably good dyno taillights, but I guess you realize that. There just isn't anything nearly as bright as a Dinotte. The reason I haven't done it to date is that one of the high power red leds is just too much if you are running the wrong kind of optic. The optic I'm using should spread the light fairly well over a wide angle.