
California E-Bike Rear Light Law 2026: What AB 544 Means for Your Ride
As of January 1, 2026, California law (AB 544) requires every e-bike to have a red rear reflector or a red rear light with a built‑in reflector at all times – day and night – visible from 500 feet. This article explains the exact requirement, how to check if your e-bike is compliant, two cost options to add a light (11DIY or 170+ integrated), and how 24/7 rear lighting affects battery life for daily commuters and delivery fleets.




