Grid 2'FerTO BE SEEN The Grid 2fer is a high powered Front and Rear Light. A quick double click of the power button switches it from White to Red. With four mode options, you can choose if you need high lumen power or extended run time. Ready for those commuting in the city, riding the open roads, or heading to their local trail. FOUR MODES High Solid full power, all the time Constant Pulse high power, always on while pulsing Fast Strobe high alert, high speed