MIL MIL-DTL-16377/12B

FIXTURES, LIGHTING; FLUORESCENT, GENERAL LIGHTING, 51 WATTS, 120 VOLTS, 60 HERTZ, WATERTIGHT SYMBOLS 333.1, 333.2, 341.1, 341.2, 342.2 AND 342.3 (SUPERSEDING MIL-F-16377/12A)
standard by Military Specifications and Standards, 08/02/1996