regarding reflectivity...
I get a LOT of comments as to my albedo when I'm commuting...two vista lights on the bike, two on my fanny pack, lights on my helmet (front & back) and usually at least two (front hub dynamo & mega Night Rider light) front lights.
Back when I was a bike wrench, and had more time, I had two bikes...one zebra (black with white reflector tape) and one tiger (orange with black reflector tape) The tiger turned into a zebra at night.
Now I just up my wattage to be seen.
happy trails,
Tom