The Blackburn Grid Rear Light packs a punch with 40 lumens, COB technology and four modes for all your riding needs. The Grid Rear Light has four mode options so 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. Grid Rear Lights offer plenty of rechargeable power to keep you visible while out riding. Little light, lots of bright. Illuminate the Grid, or your path off it.