Depends on the supply and demand curve
By holding the bulb up to the socket and waiting for the world to revolve around them.
One. Vegans have the same capability of changing a lightbulb as non-vegans.
To get to the other side
There's really no sure way to know.
Depends...
It depends on the definition of lightbulb.
I don't know. They just keep going on and on about how the last one broke.
