Lamp 334 uses a tubular T1.75 (T-1 3/4) glass envelope with a single-contact midget groove base designated S5.7s. It operates at 28 volts with a current of approximately 0.04 amps in service. The bulb diameter is about 0.23 inches and the overall length is about 0.63 inches, providing a small form factor for tight mounting locations.
The construction uses an incandescent C-2F filament. Rated life is about 4000 hours, and luminous output is specified around 4 to 4.27 lumens with an MSCP value of approximately 0.34 candlepower. The glass is clear in the standard version, and the lamp is described as single contact.
This lamp is associated with multiple aircraft uses, including indicators and instrument post lights, and it is referenced for business jets such as the Hawker Beechcraft Hawker 800, 850XP, and 900XP. Cross-referenced or related designations include Eiko 40606, GE 28588, CM334, CM334-ND, S334, E-334, GE334, JKL334, DR-334, Satco S7116, Carley CL70279, Osram 35205, Orbitec OR 334, and the NSN 6240-00-295-1617.