Added features aside, like radar-enabled rear lights for example, all bike lights need to be bright enough for their intended use, have a battery that lasts long enough that they don't leave you ...

it's the brightest on the market - more than enough for daytime visibility - and the battery life isn't terrible either. It's included in my guide to the best bike lights on the market ...

The Beryl Laserlight Core and Garmin Varia UT800 front bicycle headlights both offer ... If we are purely judging these lights on how bright they are, the Garmin Varia UT800 wins hands down.