Willis Lamm's Traffic Signal Collection (And Street Lights Too) Clicking on a picture will bring up a larger view in a new window.   Wheeler Hanson NEMA Spec "Crescent Moon" Street Light with Threaded Adapter

While most of Wheeler's street light head designs were unique, toward the end of production they also produced a version of the more commonplace "NEMA can." In addition to standard NEMA latch-on tabs, Wheeler's version had two screw holes tapped into the body with which to mount an adapter plate for the older screw-type radial wave and crescent moon reflectors. The screw-on design allowed directional reflectors, such as the crescent moons, to be oriented to any direction, then prevented from rotating by four set screws. Many of these more modern luminaires came with medium base sockets (as opposed to more common mogul base sockets) that would accommodate 189 watt (2500 Lumen) and 295 watt (4,000 lumen) lamps that were typically used in open reflector type street lamps. This reflector design helps direct light properly onto the roadway and provides cut-off to protect "dark skies." Earlier Wheeler fixtures were embossed "Wheeler Boston." The later models were embossed, "WHEELER Hanson, Mass." This particular luminaire was designed for use with 189 watt and 295 watt incandescent lamps.

Components of the Luminaire

Top view of fixture with photocontrol socket. Adapter plate for screw-on reflectors.

Hanson, Mass. embossing. Screw-on type crescent moon reflector.

Back in service for entrance lighting.

Night view.

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GE Form 79 Street Light