I like the Hyperlite LED, I made a bracket for about $1 with a mending strap from HomeDepot and mounted it behind the license plate at the lower holes. Little satin black spray and it looks like a stock item. They are really bright and easy to wire.
Melt a small hole in the fender behind the plate and angle it up, I double shrink wrapped the wires, probably overkill, and fished them to the tail next to the wires from the plate light
Durable little buggers too, this is the second bike I have had the same set on, four years old and they still look new.