Special Features:

Zlampholder capsule; legend color nvg adv white; legend engraving states "mach"; designed to prevent incorrect insertion into switch housing; capsule held captive to switch body by a retaining element to prevent accidental interchange

Properties:

An electric fitting primarily designed to electrically and mechanically accommodate a lamp. It may include an integral switch, transformer, or dropping resistor, provided these items control the lamp only. It does not include a shade, lens, reflector, or other item for modifying illumination. For items designed to mount on a conduit outlet, or junction box; see fixture, lighting.