FYI, here's another site for pre-made LED position lights:
http://www.periheliondesign.com/ledlights.htm

He has a Luxeon Star Portable 5.6W white tail-light too. (Might be
prohibitively expensive for many, tho'. These Luxeon's aren't cheap!)

(Again, for the record, I have no financial interest, blah blah blah.)

Greg Reid http://www.DivorceMagazine.com/Vision132