A light bulb is circular and turned on.
A light bulb that is glowing yellow with a black background.
a large lightbulb with bright, long, winding filament
Spherical light bulb with filaments lit up on black background.
A wonderful lightbulb on hanging on the roof
A close up of a bulb that is lit up.
vintage 1800's light fixture in a dark room
The filaments of a light bulb glow in the dark.
A clear glass light bulb shows the lit filament inside.
A rounded light bulb is dimly lit up.