47 C.F.R. § 17.54 Rated lamp voltage.
Title 47 - Telecommunication
To insure the necessary lumen output by obstruction lights, the rated voltage of incandescent lamps used shall correspond to be within 3 percent higher than the voltage across the lamp socket during the normal hours of operation. [42 FR 54826, Oct. 11, 1977]
Title 47: Telecommunication
PART 17—CONSTRUCTION, MARKING, AND LIGHTING OF ANTENNA STRUCTURES
Subpart C—Specifications for Obstruction Marking and Lighting of Antenna Structures
Aviation Red Obstruction Lighting [Reserved]
§ 17.54 Rated lamp voltage.
