Here's a handy way to create two-sided, instant illumination almost anywhere, over and over and over again. An ecologically responsible alternative to disposable chemical glow sticks, the Nite Ize LED Clip-on Marker is made with a flexible polymer strip, lit on both sides by an efficient (over 100,000 hour) LED bulb. Powered by a 2032 replaceable battery (included), it's as reusable as it is versatile. Its strong, rotating plastic clip can be attached to almost anything with a hook or ring̵