This section requires all motor vehicles, except motorcycles, to have at least two headlamps installed at the front, with one on each side. These headlamps must be positioned between 22 and 54 inches from the ground and be located above or ahead of the front axle, except for vehicles registered before 1930.

During nighttime or bad weather, vehicles must have these headlamps turned on. 'Inclement weather' includes situations where a driver can't clearly see a person or vehicle from 1,000 feet away or when windshield wipers need to be constantly used because of rain, mist, snow, fog, or similar conditions.

If you park your vehicle on a highway and your headlights are on, they must be set to the dimmed or lower beam setting.

This law explains that vehicles can have up to two additional lights on the front called driving lamps and passing lamps. Driving lamps help brighten the upper beam and must be mounted between 16 and 42 inches high. These should not be used with the lower beam lights. Passing lamps, on the other hand, assist the lower beam and can be used with the upper beam. They must be placed 24 to 42 inches high.

In California, a motor vehicle can have up to two fog lamps, but they must be used alongside, not instead of, the regular headlights.

For cars, the fog lamps should be mounted on the front, between 12 and 30 inches high. They must be aimed so that the beam's bright part is at least four inches below the lamp's center level for a distance of 25 feet in front.

For motorcycles, fog lamps should be mounted at a height between 12 and 40 inches with similar aiming requirements as cars.

This law allows motor vehicles to have up to two white spotlights, but they cannot replace headlights. Spotlights must be limited to 32 candlepower or 30 watts and shouldn't cause glare for oncoming drivers.

When used, spotlights should be aimed so that they don't shine to the left of the vehicle or beyond 300 feet ahead. This regulation doesn't apply to emergency vehicles. Additionally, spotlights shouldn't illuminate other moving vehicles when in use.

This section of the law states that you can have no more than four front-facing lights on a vehicle turned on at one time. These lights include headlamps, auxiliary driving or passing lamps, fog lamps, warning lamps, spot lamps, and specific gaseous discharge lamps. For vehicles with dual headlamp systems, each pair counts as a single lamp. Importantly, this limitation doesn't apply to authorized emergency vehicles.

This law requires that a vehicle's headlights or auxiliary driving lights must be set up so the driver can choose between different light levels. This choice can be made manually or automatically.

This law outlines how vehicle headlights with multiple beams should be set up. The high beam needs to be bright enough to see people and cars at least 350 feet away. The low beam should allow you to see at least 100 feet ahead without shining directly into the eyes of oncoming drivers.

This California law requires that any new motor vehicle registered after January 1, 1940, that uses headlights with multiple beam settings must include a beam indicator. This indicator lights up when the high beams are in use and should not light up at other times.

The design and placement of the indicator should ensure it is visible to the driver without causing glare and must have a light source no stronger than two candlepower. The light should not be visible from the front or sides of the vehicle.

Autonomous vehicles that can't be driven by a human driver are exempt from this requirement, provided it's in line with or authorized by any relevant federal laws or regulations.

This law states that when driving at night, motorists must use headlights that are bright enough to see people and cars at a safe distance ahead. However, when within 500 feet of an oncoming vehicle, drivers should adjust their headlights to prevent blinding the other driver. Similarly, when following another car within 300 feet, the driver should use the lower beam setting to avoid glare.

This law states that cars made and sold before September 19, 1940, can use headlights that produce one beam of light instead of multiple beams if they meet certain conditions. The headlights must be aimed so that the brightest part of the light doesn’t shine higher than 5 inches below the lamp’s center at 25 feet, and not higher than 42 inches at 75 feet. Additionally, the light should be strong enough to illuminate objects or people at least 200 feet away.

This law allows vehicles to have up to eight headlights for off-road use, but there are specific conditions. These lights must be between 16 inches from the ground and 12 inches above the passenger area. They need to be placed between the front of the vehicle and a point 40 inches behind the driver’s seat. They must have their own wiring and when the vehicle is on a highway, they should be covered with an opaque hood and turned off.