light bulb 
noun
A glass bulb inserted into a lamp or a socket in a ceiling, which provides light by passing an electric current through a filament or a pocket of inert gas: the watchman switched on an electric light bulb...
- The British Courts stood by their patent award for the light bulb to Swan, and Edison lost the suit.
- Although this is optional, I highly recommend it because this helps make the light bulb less fragile.
- Incandescent and halogen light bulbs can fade colors if they are very close to the light source.
- punchily
- Punchinello
- Punchinello voice
- punchiness
- punching bag
- punching ball
- punching block
- punching match
- punching press
- punch in (or out)
- punchless
- punchline
- punch list
- Punch-man
- punch-mark
- punch-marked
- punch one's ticket
- punch-out
- punch-packed
- punch-packing
- punch plate
- punch press
- punch-prop
- punch-pull
- punch-pulling