14 C.F.R. § 27.1383 Landing lights.
Title 14 - Aeronautics and Space
(a) Each required landing or hovering light must be approved. (b) Each landing light must be installed so that— (1) No objectionable glare is visible to the pilot; (2) The pilot is not adversely affected by halation; and (3) It provides enough light for night operation, including hovering and landing. (c) At least one separate switch must be provided, as applicable— (1) For each separately installed landing light; and (2) For each group of landing lights installed at a common location.
Title 14: Aeronautics and Space
PART 27—AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT
Subpart F—Equipment
Lights
§ 27.1383 Landing lights.