The Bontrager Flare R is a compact rear light with 3 leds & a 65 lumens output that can be seen both day or night. The Bontrager Flare R has been designed with balanced optics to predominately keep cyclists safe during the day. The Flare R Bike light rays covers 270 degrees of your road space, making you visible to road users near or far. The light functions allow you to put a steady or flash mode for day & night visibility, while the handy 5% battery life ensures you get home safely.