Electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
One great ornament idea is to make a Santa ornament out of a used lightbulb.
The familiar lightbulb sea squirt also multiplies by budding, with the zooids remaining attached at the base to form colonies.
If you've never seem a tea light lamp before, they're basically lamp-shaped candle holders, complete with shades, that use a tea light candle instead of a lightbulb for illumination.