The electric arc lamp and sodium-vapor lamp posts have me thinking about how utterly cursed mercury-vapor lamps are.
Toxic, produced UV light, and then that sickly green tint to the light that sucked the life of everything. In short, it was the color of gym class.
I find it interesting that people are referring to mercury-vapor lamps as arc lamps, because it makes logical sense, but at the same time, an arc lamp to me is either a carbon arc lamp or xenon arc lamp, and what I associate that eye-destroying bluish-white color with.