Equipment on California Bicycles per California law (California Vehicle Code Sections 21202 and 21204):

California bicycles must be equipped with at least a brake which allows operators to execute to a wheelskid on dry, level, clean pavement. Handlebars must not be higher than the rider’s shoulders. Bicycles must be small enough for the rider to stop, support it with one foot on the ground, and restart safely.   All riders must have a permanent, regular seat. Bicycle passengers under 40 lbs. must have a seat which retains them in place and protects them from moving parts.

At night California bicycles must be equipped with a white headlight or white light attached to the rider, and visible from the front. Bicycles must also have a rear red reflector and white or yellow pedal reflectors. There must be a white or yellow reflector on the front of the bicycle visible from the side, and a red or white reflector on the rear of the bicycle visible from the side.