Under California law, cyclists are required to have a red reflector visible from the rear when operating the bike at night. Those of you riding in darkness with a 200 lumen tail light without a rear reflector are in violation of CVC 21201.
Last week, Assembly member Kansen Chu from San Jose amended AB 28 to allow flashing or steady red lights in lieu of reflectors.
You might recall this bill infamously began life as an attempt to require flashing white tail lights. The California Bicycle Coalition and the California Association of Bicycle Organizations both used AB 28 as an opportunity to reach out to Chu’s office. The result is this much more sensible bill.
Read more recent amendments (there are several) at 2015 California bicycle legislation Spring update.