S.C. Code Ann. § 55-9-90

The division and such counties, municipalities and other political subdivisions of this State may acquire the right or easement for a term of years, or perpetually, to place and maintain suitable markers for the daytime and to place, operate and maintain suitable lights for the nighttime marking of buildings or other structures or obstructions, for the safe operation of aircraft utilizing airports acquired or maintained under the provisions of this chapter. Such rights or easements may be acquired by grant, purchase, lease, or condemnation in the same manner as is provided in this chapter for the acquisition of the airport itself or the expansion of it.