Even when I am driving, it's almost impossible to see a cyclist on side of road or in bike lane at night even when they have lights. I don't think lights for bikes really do much - it's too hard to pick out a bike from just reflections and such. It's a LOT more dangerous at 4:30 am riding than at 9am or 7pm. And it only takes ONE mistake by a driver that's a little tired or doesn't really see you. Your risk are greater at night period. No reason to disturb the Bike Gods. When it's dark, stay off the bike. Period.