Reflectors in my lousy opinion are virtually useless. I've come up behind many cyclists with just reflectors in my car and never saw the reflector till I was about 30 feet (and a lot times less) from them and then it was the pedal reflectors I noticed first! Your not going to have any legal problems in a law suit if your light was working and you don't have a reflector.

I've gone a bit over board with my rear lights. I have a Bell Metro with the Blackburn rear light installed in the helmet set to steady, then I have barend lights set on flash (to conserve the little button batteries), then I have 2 Cateye LD600's mounted to the rear stays on steady mode, and then finally a Planet Bike Superflash mounted to the seatpost on flash mode; these arranged like this form a triangle which I think is safer but who knows? But I personally like the LD600 better then the Superflash only because they can be seen way better from the sides; If I could only afford one taillight then I would get the Cateye LD600 due to the side visiblity factor; even the little barend lights I have can be seen better from the sides then the Superflash, but the Superflash is a bit brighter then the LD600's when viewed from straight behind.

By the way I also use reflector leg bands.