(a) From thirty minutes after sunset until thirty minutes before sunrise, every motor vehicle moving upon any public highway shall carry at the front thereof at least two lighted head lamps which shall display white lights of equal candle power. The head lamps shall be securely mounted, not less than twenty-two inches nor more than fifty-four inches above the road surface when measured to the head lamp center, on a rigid part of the vehicle designed specifically for head lamp installation by the manufacturer, and so arranged, adjusted, and constructed that, when the motor vehicle is fully loaded, any pair of headlights under the conditions of use shall produce a light sufficient to reveal any person, vehicle, or substantial object on the highway straight ahead of the motor vehicle for a distance of two hundred feet. The light when measured at a distance of one hundred feet directly in front of the motor vehicle, and at a height of sixty inches above the level surface on which the motor vehicle stands, shall not exceed two thousand four hundred apparent candle power, nor shall this candle power be exceeded at a greater height than sixty inches.
When measured at a distance of one hundred feet ahead of the motor vehicle and seven feet or more to the left of the axis of the same, and at a height of sixty inches above the level surface on which the motor vehicle stands, the light shall not exceed eight hundred apparent candle power.