Street Lights with Trolley Lines
During the height of electric streetcars, or trolleys, many street lights doubled as poles for the electric lines of streetcars. The posts were extended far up past the lamps, and a wire can often be seen connected to the tip of the post. Streetcars were introduced in the 1890s and were largely abandoned by the end of the 1920s. The style of lamp utilized in these fixtures can also help to further narrow the date. The image on the far left appears to utilize arc lamps, indicating an earlier date than the incandescent globes seen in the other images.