KRS 189.055: Brake lights.

A person shall not operate any vehicle required by law to be licensed upon a highway

unless it is equipped with a mechanical signal device which would indicate an intention

to stop or suddenly decrease speed by illuminating at least two (2) red lights on the rear of

the vehicle, which are visible from the rear a distance of not less than five hundred (500)

feet, unless the vehicle was originally manufactured with only one (1) such red light on

the rear of the vehicle.