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Sec. 18-130. When dimming headlights, etc., required.[269]

Whenever a vehicle is being operated upon a street or a
portion thereof which is sufficiently lighted to reveal any person
or object upon such way at a distance of three hundred
and fifty feet ahead, the operator of such vehicle shall use
one of the lowermost distributions of light or shall dim the
head lamps if the vehicle has single-beam lamps. Whenever
a vehicle approaches an oncoming vehicle within five hundred
feet it shall be the duty of the operator of such vehicle to
use one of the lowermost distributions of light so aimed that
glaring rays are not projected into the eyes of the oncoming
driver, or to dim the head lamps if the vehicle has single-beam
lamps.

Whenever the operator of any motor vehicle approaches
from the rear or follows within two hundred feet of another
vehicle proceeding in the same direction, such operator shall
use the lowermost distributions of light or shall dim the head
lamps if the vehicle has single-beam lamps. (Code 1959, §
18-130.)