This design was introduced at some time in the 1890s and pretty much were the standard style for incandescent street lamps on utility poles across the US through the early teens. The "conical" 14-inch diameter metal reflectors upon these fixtures had white porcelain undersides. Typically a 3/4-inch section of pipe was used as a bracket. GE, Westinghouse, Pemco, Wheeler Reflector Co. and a number of other outdoor lighting manufacturers offered these luminaires. By the 1915 heavy-duty porcelain fixture heads were becoming standard for electric utility use and some of these were mounted on 1-1/4-inch pipe brackets with wrought iron ornate "scroll" undersupports. The latter had radial wave "ruffled-edge" reflectors that were quite commonplace for decades thereafter.