None. Each lightbulb contains the means of its own revolution.
None, he lets the knives do the work
None. The change, if needed, will come from within.
None. They glow in the dark.
Only one but they'll insist on going through about 5 bulbs before they find one that suits this particular room and situation.
The soviet Onion
The USS Arrrrrr
In tennis, love means nothing.
It means urine business.
A pigeon... "Coup, coup"
None: The light bulb contains the seeds of its own revolution.
An Envelope EDIT: My deepest Canadian apologies to those who are calling this a riddle. I always took it as a cheesy joke
It couldn't contain itself.