Anyone who runs or cycles after the sun goes down will tell ya, it's vitally important to make sure that you're visible to motorists. Nathan's LightSpur is one of the latest products designed to provide you with that visibility, and it looks like it draws equal inspiration from Tron and A Fistful of Dollars.
The LightSpur simply clips around the heel of your shoe and grips against it. Once activated, its LED light band (which incorporates two bulbs) then illuminates to draw everyone's attention to the back of your bobbing shoe. You can switch between flashing and solid light settings.
LightSpurs are waterproof, weigh 1.2 oz (34 g), and are powered by a replaceable CR2032 watch battery that should provide over 100 hours of use in flashing mode.
They sell for around US$20 each – they're not sold in pairs. A similar product, the Trainer LED Heel Light, is sold by Target Fitness. We spotted it in prototype form last September at the Interbike trade show.