14 CFR § 27.1391 - Minimum intensities in the horizontal plane of forward and rear position lights.

---
identifier: "/us/cfr/t14/s27.1391"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 27.1391 - Minimum intensities in the horizontal plane of forward and rear position lights."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "27.1391"
section_name: "Minimum intensities in the horizontal plane of forward and rear position lights."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "C"
subchapter_name: "AIRCRAFT"
part_number: "27"
part_name: "AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 106(f), 106(g), 40113, 44701-44702, 44704."
regulatory_source: "Docket No. 5074, 29 FR 15695, Nov. 24, 1964, unless otherwise noted."
cfr_part: "27"
---


# 27.1391 Minimum intensities in the horizontal plane of forward and rear position lights.

Each position light intensity must equal or exceed the applicable values in the following table:

| Dihedral angle (light included) | Angle from right or left of longitudinal axis, measured from dead ahead | Intensity (candles) |
| --- | --- | --- |
| and  (forward red and green) | 10° to 10°10° to 20°20° to 110° | 40305 |
| (rear white) | 110° to 180° | 20 |