The Xfire Safety Light Laser-Generated Bike Lane. This battery-powered safety light clamps to your bike frame and projects highly visible red laser images on the ground on either side of your bike, simulating an instant bike lane that helps alert drivers to your presence. The intense laser markers are visible over a mile away, even under headlights and streetlights. The device also includes an LED flashing taillight for extra visibility. Three AAA batteries keep the light for 20 hours.