Section 47. (a) Headlights. — Every motor vehicle of more than one meter of projected width, while in use on any public highway, whether in motion or not, shall bear two lamps one on each side, with white or yellowish light visible from the front, which not later than one-half hour after sunset and until at least one-half hour before sunrise, shall both be lighted. Additional lamps and lights may be carried, but no red, green or other colored lights shall be visible forward or ahead of the vehicle.

(b) Glaring headlights. — The headlights of motor vehicles shall be so arranged and adjusted that, except as otherwise provided herein, they will at all times when lighted produce a sufficient driving light, but shall not project a glaring or dazzling light to persons in front of such headlight.

Headlights shall be dimmed to comply with the foregoing provisions prohibiting glaring and dazzling lights if none of the main bright portion of the headlight beams rises above a horizontal plane passing through the lamp centers parallel to the level road upon which the loaded vehicle stands, and in no case higher than one meter at a distance of twenty-five meters ahead of the vehicle.

Operators of motor vehicles equipped with devices for varying the intensity of light may dim the headlights or tilt the beam downward, or substitute therefor the light from one or a pair of non-glaring auxiliary driving lights, whenever the vehicle is being operated on well-lighted streets within the limits of cities, municipalities, and thickly populated barrios or districts, or whenever such vehicles meets another motor vehicle on any public highway.

(c) Tail lights. — Every motor vehicle and trailer shall further, during the hours aforesaid, bear in the rear a lamp showing a red light visible at least one hundred meters from the rear of the vehicle and throwing a white light upon the number plate issued for such vehicles.

(d) Conditions requiring lights. — The hours herein fixed within which such lamps shall burn shall not exempt operators from the obligation of lighting such lamps at earlier or later hours or times, when on account of atmospheric or weather conditions or other phenomena, the use of such motor vehicles upon public highways might otherwise be dangerous or unsafe.

(e) Motorcycle and other vehicle lights. — Every motor vehicle of less than one meter of projected width shall be subject to the preceding provisions of this section, except that but one head lamp and one tail lamp will be required thereon.

Additional lamps may be carried provided they comply with the preceding provisions of this section.

Every other vehicle, of whatever style, kind, make, character, or nature, whether motor or animal driven, when upon a highway during the hours aforesaid, whether in motion or not, shall bear one or more lights so arranged that same shall be visible from the front and the rear of such vehicle.

(f) Lights when parked. — The provisions of this section shall not apply to vehicles parked or standing on well-lighted streets of cities and municipalities, nor to vehicles parked entirely off from and clear of the surfaced portion of any highway, in such a position as to constitute no danger to any passing traffic.

(g) Every windshield on a motor vehicle shall be equipped with a device for cleaning rain or other moisture from such portion thereof as comes within the driver's view, which device shall be capable of being controlled or operated by the driver of the vehicle.

(h) Whenever the load on any vehicle extends more than one and one-half meters beyond the rear of the bed or body thereof, there shall be displayed at the end of such load a red flag not less than thirty centimeters both in length and width, except that during the hours fixed under subsections (a) and (d) hereof, there shall be displayed at the end of any such load a red light visible at least fifty meters from the rear of such vehicle.