S.C. Code Ann. § 56-5-4820

At all times specified in Section 56-5-4450 at least two lighted lamps shall be displayed, one on each side at the front of every motor vehicle other than a motor cycle or motor-driven cycle, except when such vehicle is parked subject to the regulations governing lights on parked vehicles. Whenever a motor vehicle equipped with head lamps as herein required is also equipped with any auxiliary lamps, a spot lamp or any other lamp on the front thereof projecting a beam of an intensity greater than three hundred candle power, not more than a total of four of any such lamps on the front of a vehicle shall be lighted at any one time when upon a highway.