B1
a glass object that produces light from electricity
Dictionary examples:
I named my favorite light bulb 'Bright Idea' because it always helps me study. (0.0)
My cat thinks the light bulb is the moon and meows at it all night. (0.0)
The light bulb in my closet only turns on when I'm not looking for something. (0.0)
an energy-saving light bulb (22.9)