The Bell Lumina 325 Light Set gets you great visibility at a great value, featuring a 90-lumen headlight and 4 Lumen taillight. The headlight uses three AAA batteries for ease of use and long life. The taillight uses two included CR2032 batteries. Both lights use silicone straps for easy tool-free installation. 90 Lumen Headlight: Run time 22-40h, 3 AAA batteries (not included) Strong focused beam to see the road 4 Lumen Taillight: Run time 9-20h, 2 CR2032 batteries (included) Steady and flash modes