This 2-in-1 light can act as a head light or tail light with the push of a button. The 2'Fer light by Blackburn features a 60 lumen output for the front setting, and a 20 lumen output for the rear setting. It features excellent side visibility and can stay lit for up to 5 hours straight in flashing mode. The 2'fer also includes an LED fuel gauge/charge indicator to keep track of the status of the lithium-polymer battery.