The street lamp fixture shown is an incandescent (filament-type) and is of the span wire radial-wave-reflector design that operated on a then-commonplace series lighting circuit. Two of the wires that powered it apparently were terminated or "dead-ended" on the pole in the background. Of interest, some dedicated street lighting wires were identified by specially colored glass insulators, including cobalt blue and amber ones made by Hemingray through the 1920s.