14 C.F.R. § 23.1391 Minimum intensities in the horizontal plane of position lights.
Title 14 - Aeronautics and Space
Each position light intensity must equal or exceed the applicable values in the following table: [Doc. No. 4080, 29 FR 17955, Dec. 18, 1964, as amended by Amdt. 23–43, 58 FR 18977, Apr. 9, 1993]
Title 14: Aeronautics and Space
PART 23—AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES
Subpart F—Equipment
Lights
§ 23.1391 Minimum intensities in the horizontal plane of position lights.
------------------------------------------------------------------------ Angle from right or left of longitudinal Intensity Dihedral angle (light included) axis, measured from (candles) dead ahead------------------------------------------------------------------------L and R (red and green)............. 0° to 10°..... 40 10° to 20°.... 30 20° to 110°... 5A (rear white)...................... 110° to 180°.. 20------------------------------------------------------------------------