The Fenix BC21R projects a bright, broad beam of 880 lumens. It comes with a spare 18650 rechargeable Li-ion battery and a power-saving feature called Intelligent Output Downshift that automatically steps the light down to a lower setting, both of which extend ride time. However, it does not include a helmet mount and the rubber-ladder handle bar mount strap is flimsy.
Knog Blinder ARC 640
The Knog Blinder ARC 640, which hails from Australia, projects a bright, broad beam of 640 lumens and hits the sweet spot for bike commuting in terms of overall quality and looks. Powered by a USB-rechargeable Lithium Polymer battery, it is durable and its integrated silicone mounting system accommodates a wide variety of handlebar sizes. However the light switch is challenging to operate when wearing gloves.
Lezyne Macro Drive 1100XL
The Lezyne Macro Drive 1100XL projects a bright, wide, powerful beam of 1100 lumens. It has six brightness modes to provide a variety of illumination levels for urban and mountain bike rides, including a flash and pulse mode. However it can be difficult to attach to handlebars due to the miniscule pull-tab.