saw this super strong tail light on youtube:

http://www.youtube.com/watch?v=pVisFnaKjso

it yields a rather impressive glow even for daytime use (which is what im after)
I understand one cannot purchase them anymore as the maker of them got way too many orders and cant keep up with the demand
(I dont see why he wont have more people constructing these lights for him\with him in his workshop[) but anyway

I was thinking if it would be possible to take another headlight of the same caliber (500 lumen and up) and somewhat improvise a red screen or case for it that would render it red or other colour suitable for tail light use... can it be done? did anyone try it?

I'd appreciate any ideas...

thanks!
-Emmanuel