bulb lamp lantern light lightness metal source of light street lamp cutout isolated post abstract body body in darkness dark darkness head in darkness light and shadow light source man man in dark one man only man only one man pattern shadow striped pattern base cap cost current double-contact-bayonet-base edison-screw-base electric-current electricity embedded-wires emissions filament gas-discharge globe glow glowing incandescence incandescent-light instant-start light-source lighting luminosity luminous luminous-efficacy sleeve standard stem traditional ultraviolet ultraviolet-emissions ultraviolet-light ultraviolet-radiation boat direction glass green navigation red sea security ship yacht crown crowns drop drops macro sink water