Here's what I want in a tail light:

1. Built in reflectivity. This seems like an obvious element that a surprising number of lights don't have.
2. Bright, but doesn't need to be so bright it blinds airplanes.
3. At least 180 degrees of visibility. I want to be seen from the side too.
4. A mounting bracket that screws down with a clamp. Elastic band straps always break or slide down on me.
5. $20 - $40 price range

I started researching but found it annoying how hard it is to get all these elements in a light. Anybody have a light with all/most of these features that they'd recommend? The Cateye Reflex LD560 seems good...anybody use that light?