The Planet Bike Superflash Stealth is one of the brightest rear bike lights available.

Red half-watt LED with optic lens, plus two red LEDs provide visibility up to one mile.  Unique, eye-catching flash pattern increases visibility. Includes flashing and steady modes.

Compact vertical design is water resistant, lightweight and durable. Comes with seat post, rear stay and clip mounts. Up to 100 hours of run time. Includes two AAA batteries.

Weights
1.1 oz (30g) without batteries
1.8 oz (52g) with alkaline batteries