This ultra-compact safety light mounts quickly to your helmet, seatpost, handlebars or anything the Velcro strap can grab onto.
Nichia eXtreme 2.0 LEDs provide 220 degrees of visibility and won't dim with age. The hood over the beam keeps the light out of your eyes.
See also Spok's red twin, the Spok LED Micro Bike Tail Light.
Save when you buy a headlight and tail light set: Planet Bike Spok LED Light Set.
Planet Bike Superflash Turbo 1 Watt Bike Tail Light