S.C. Code § 56-5-4830
Any lighted lamp or illuminating device upon a motor vehicle, other than head lamps, spot lamps, auxiliary lamps, flashing turn signals, emergency vehicle warning lamps, and school bus warning lamps, which project a beam of light of an intensity greater than three hundred candlepower shall be so directed that no part of the high intensity portion of the beam will strike the level of the roadway on which the vehicle stands at a distance of more than seventy-five feet from the vehicle.
A person shall not drive, move, or park any vehicle or equipment upon a highway with a lamp or device on it displaying a red or blue light visible from directly in front of the center of it. This section shall not apply to a vehicle upon which a red or blue light visible from the front is expressly authorized or required by this chapter.
Flashing lights are prohibited except on an authorized emergency vehicle, school bus, snow-removal equipment, or on any vehicle as a means of indicating a right or left turn or the presence of a vehicular traffic hazard requiring unusual care in approaching, overtaking, or passing.
S.C. Code § 56-5-4830