After a cyclist is hit at night, the driver often says the same thing: “I never saw them.” Whether that ends the claim depends on three things: what was on the bike, what the driver was required to do, and the evidence. In California, a missing light can reduce a cyclist’s recovery. It does not, by itself, bar the claim.
What California Requires on a Bike After Dark
Vehicle Code section 280 defines darkness as the period from a half hour after sunset to a half hour before sunrise, plus any other time visibility is too poor to clearly see a person or vehicle at 1,000 feet. During darkness, Vehicle Code section 21201(d) requires a bicycle ridden on a street, a bikeway, or a sidewalk where riding is allowed to have:
- Front: a white lamp that lights the way ahead and is visible from 300 feet in front and from the sides. A white light worn by the rider, such as a helmet light, visible from the same distances, can take its place.
- Rear: a red reflector, or a solid or flashing red light with a built-in reflector, visible from 500 feet to the rear when directly in front of a motor vehicle’s lawful high beams.
- Pedals, shoes, or ankles: a white or yellow reflector on each pedal, shoe, or ankle, visible from the front and rear at 200 feet.
- Sides: a white or yellow reflector on each side forward of center, and a white or red reflector on each side behind center. Reflectorized front and rear tires can replace the side reflectors.
Two details are often misunderstood. First, a rear light is not required on a conventional bicycle; a compliant red reflector satisfies the rear requirement, so a rider with a proper rear reflector and no taillight met that part of the law, as long as the front lamp and the other reflectors were in place. Second, since January 1, 2026, an electric bicycle must carry the rear red reflector or red light at all hours, day or night, under Vehicle Code section 21201(f).
What Drivers Owe Cyclists at Night
A cyclist on the road has the rights, and the duties, of a driver under Vehicle Code section 21200, and every driver owes ordinary care to everyone else on the road under Civil Code section 1714(a). At night that duty has specific content:
- Speed has to fit the visibility. The basic speed law, Vehicle Code section 22350, bars driving faster than is reasonable or prudent given weather, visibility, and traffic. A driver who could not stop within the distance the headlights revealed may have a hard time calling that speed reasonable.
- Headlights have to do their job. Under Vehicle Code section 24409, a driver in darkness must use headlight beams aimed high enough and bright enough to reveal persons and vehicles at a safe distance ahead. The same section requires low beams within 300 feet behind another vehicle and bars glaring an oncoming driver within 500 feet, which low beams are deemed to satisfy. A driver who was properly on low beams in traffic did not violate this section, but still had to match speed to what those beams revealed.
- Three feet when passing. Vehicle Code section 21760, the Three Feet for Safety Act, bars passing a bicycle traveling in the same direction with less than three feet between any part of the car and any part of the bike or rider. If the cyclist is riding in the driver’s lane and another lane going the same direction is open, the driver must move into that lane before passing, when it is practicable, safe, and not prohibited. If three feet is not possible, the driver must slow down and pass only when it will not endanger the cyclist, taking visibility into account.
- Keep a lookout. Ordinary care includes watching for what can reasonably be expected on the road, and cyclists in bike lanes, at intersections, and to the right of a turning car are expected.
If You Had No Light: Fault Is Reduced, Not Erased
California follows pure comparative negligence. If a jury finds a cyclist partly responsible, the award is reduced by the cyclist’s share; it is not wiped out. Our guide to comparative negligence in California walks through the math.
Insurers often treat a missing light as if it decides everything. It does not. Under Evidence Code section 669, violating a statute creates a rebuttable presumption of negligence only if, among other things, the violation caused the injury and the injury is the kind the statute was meant to prevent. The same rule cuts against the driver: a pass closer than three feet, or a speed too fast for the conditions, can raise the same presumption.
Causation is where these cases are decided, so match the missing equipment to the crash:
- A rider rear-ended by an overtaking car, with a compliant rear reflector, had the main piece of equipment that faces that driver. A missing headlight may have nothing to do with it.
- A driver turning left across an oncoming cyclist’s path was looking at the front of the bike, so the front lamp matters more there.
- On a well-lit street, or with a driver looking at a phone, the bike’s equipment may have made no difference at all.
Evidence That Answers “I Never Saw Them”
- The lights and reflectors themselves. Keep them, even broken. Note whether the light was set to steady or flashing, and keep any receipt showing the model. Do not fix or strip the bike.
- Your clothing. Keep what you wore, including anything reflective, and photograph it.
- Video. Your own helmet or handlebar camera, the driver’s dashcam, and doorbell or business cameras nearby. Ask quickly; many systems overwrite footage within days.
- Scene lighting. Go back at the same time of night, or send someone, and from a safe spot off the roadway photograph and film the approach from the driver’s direction. Note any streetlights that were out.
- The driver’s attention. If distraction is suspected, phone records and vehicle data can be sought, and preservation letters should go out early.
- The police report and witnesses. Officers often note lighting conditions and whether the bike had lights. Get the names and numbers of anyone who stopped.
For more on how these claims are handled, see our bicycle accidents page.
What to Do This Week
- Store the bike, lights, and clothing exactly as they were after the crash.
- Return to the scene at the same hour, or have someone do it, and record the lighting from a safe spot off the road.
- Ask nearby homes and businesses for video before it is erased.
- Request the police report.
- Write down exactly what equipment was on the bike, and do not guess when an adjuster asks. If the driver’s insurer wants a recorded statement, read our take on recorded statements first.
- Put two years from the crash on your calendar. That is the general deadline to file suit under Code of Civil Procedure section 335.1. If a city, county, or other public entity might be a defendant, for example because the driver was in a government vehicle or because a road defect played a part, a written claim must be presented to that entity within six months under Government Code section 911.2.
About the author. Joshua B. Adelpour is the founder of Not My Fault Law Group, APC, a California personal injury firm based in Woodland Hills. He is licensed by the State Bar of California, Bar No. 318226, and spent nearly a decade defending insurance companies in civil litigation before opening the firm. Call (213) 800-0706 for a free consultation.
This article is general information about California law and is not legal advice. Reading it does not create an attorney client relationship. Every case depends on its own facts. Last updated October 6, 2026.