I had a couple rolls of Scotch reflective tape, and put some on my rack, cranks, and pedals, but hesitated before putting any on the frame of my black Cross Check. Then one morning my bike was in the garage with the lights off, and the tiny bit of light coming through the basement door lit up the reflectors on the rack so much that I decided to put the rest of the tape on my seat stays and fork. Might not look as cool, but it's a little more insurance that I'll live to ride another day.