I have the 10w single light Performance clone of the Niterider.... the Veiwpoint I think. Nothing fancy-- frame mounted battery, off/on switch, little bar mounted light... around 75 bucks U.S. I think.
I get by with mine OK, but understand some folks might need more light/longer run times. So buy two of the simple cheap ones. Go to Batteries Plus and get extra batteries made. I'd keep it simple.