No searchlight or spotlight shall be equipped with a bulb stronger than twenty-one candle power, and no such searchlight or spotlight shall be used on a street except in an emergency, or when headlights are inadequate owing to rain, fog, etc., and then only provided their shaft of condensed light is directed well downward below the level of the lamp, and at no time into the eyes of other persons.

(Code 1964, § 12.1080)

     State law reference(s)--Similar provisions, RSMo. § 307.090.