After all the money we spend on headlights and taillights, we can still be almost invisible from the side (especially to drivers who aren't paying enough attention - and there are a lot of those people out there). About three years ago I started using Nite Ize SpokLits, which I think work great. The problem is that they won't fit on wheels with spokes that are spaced farther apart, like a lot of road bikes. Then last week I discovered a new product from NiteIze call the See'Em.

It's much smaller than the SpokLit (it clips on a single spoke), and unlike the SpokLit, the light is mainly visible from just one side (so they come two per package). Mine just arrived today and they seem to be plenty bright. So for anyone else out there whose spokes are too far apart for SpokLits, this may finally be the answer.