I've been running a Niterider Lumina 550 for the past year. Awesome light, I generally run it on the 250, or medium, setting. This is fine
for my night rides around the 'burbs, where there is usually (Not always) adequate street lighting. Not only does NR make a fine headlight,
but they have also designed brackets that...just...work.

Niterider puts out some fine stuff. Even their lower end lights work well.

I cannot explain it, but battery bags, "the battery goes somewhere else" drive me nuts.