Really, I think the more you spend the happier you'll be with the light. I used to use a Cateye EL-510 that I got for about $35 on eBay. That was a pretty good light to be seen and it was marginally OK in areas with no other light, but on unlighted streets with cars coming in the opposite direction, I couldn't see a thing. This year I got a Dinotte 200L-AA and I've been very happy with it. It's much brighter than the Cateye and has been bright enough for my purposes. On an unlit MUP, I've spotted a gray cat and the black pavement from ~100 yards. Another thing that's great about the Dinotte is that the light it produces is very even. The Cateye had a single bright spot in the center of a broader field of dimmer light. With the Dinotte no such spot is discernable.