If we had a dollar for every bike light we’ve broken, lost or had stolen, we could build our own bike light factory. You never have to sweat a bike light mishap with these safety lights since they go for under 3 bucks each, batteries and all. Lights are white or red and run on (included) button cell batteries. Energy-efficient and water-resistant, with 30 lumens and (3) modes: solid, slow strobe and fast strobe. Plastic clip makes them easy to attach to clothes.