Equipment of Off-highway VehiclesLighting Equipment
Section § 38335
This law requires that when driving a motor vehicle from half an hour after sunset to half an hour before sunrise, the vehicle must have at least one white headlight facing forward. The headlight must be bright enough to illuminate people and vehicles up to 200 feet ahead.
Section § 38345
This law mandates that each motor vehicle must have at least one red taillight that is clearly visible from the rear when driving between half an hour after sunset and half an hour before sunrise. This also applies to the last vehicle in a series of connected vehicles, such as trailers or caravans.
Section § 38346
In California, you're not allowed to have a flashing or steady red or blue warning light on an off-highway vehicle, like an ATV, unless it's allowed by another law or there's a serious danger.