Electromagnetic bike lights

If you’re a bike commuter who doesn’t enjoy worrying about battery levels on your bike’s headlights or taillights, check out this relatively new green gadget: the electromagnetic bike light. Electromagnetic lights built by several manufacturers—including Danish company Reelight (www.reelight.com) and German start-up Magnic Light (www.magniclight.com)—don’t require batteries. Instead, they utilize magnets attached to spokes—and even magnetism from the wheels themselves—to draw power into high-efficiency LED bulbs. While the sleek Magnic Light is still fundraising on Kickstarter at the time of writing, Reelight is already producing several products available at various bike retailers and sites like Amazon.com.