At first I thought, the Niterider Solas looks like it has the same brightness as the Cygolite Hotshot, but costs more and has fewer options. So what?
But I searched and found comparisons, and it looks like it has better optics, spreading the beam more:
http://forums.mtbr.com/lights-night-...ks-828323.html
Still, since they dropped the price on the Serfas Shield down to $39, I'd have a hard time not spending the extra $5 and buying that instead. Without going to Dinotte (which I consider to be vast overkill), I think it's about the brightest around in the self contained/rechargable arena.