I've been on the fence about getting a decent rear light. I have a collection of front lights and now considering taking an old 10 watt TrailRat and converting it to rear light status.
Last night I took some transparent red MonoKote and placed it in front of the light and it did a fairly good job of creating a bright red light.
Unfortunately, MonoKote is thin and will probably melt from the heat of the light. Ideally, I'd like to use a piece of red plastic and affix that in front of the light. Sure, it sounds crude, but I think most cars use nothing but a regular 15-20 watt light with a red cover, so my approach is not much different.
Anyone do anything similar? Any suggestion on where to source red plastic?