Planet Bike's 1/2 watt Blaze is a pretty good light and well under $100. It's bright, but I wish it had a bit wider beam pattern. It's a great light for the price though. I typically point mine down a bit so I can catch any "surprises" that may be lurking on the dark road surface. There's also the 1 watt Blaze which is still under $100 and presumably brighter (haven't tried it). The battery life is much shorter on this light, which was a deterrent for me (don't want to be replacing batteries a couple of times a week).