47 CFR § 17.54 - Rated lamp voltage.

---
identifier: "/us/cfr/t47/s17.54"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "47 CFR § 17.54 - Rated lamp voltage."
title_number: 47
title_name: "Telecommunication"
section_number: "17.54"
section_name: "Rated lamp voltage."
chapter_name: "FEDERAL COMMUNICATIONS COMMISSION"
subchapter_number: "A"
subchapter_name: "GENERAL"
part_number: "17"
part_name: "CONSTRUCTION, MARKING, AND LIGHTING OF ANTENNA STRUCTURES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "47 U.S.C. 154, 301, 303, 309."
cfr_part: "17"
---


# 17.54 Rated lamp voltage.

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]