Only one, but the light bulb should be willing to change.
None that's a hardware problem
Changing attire.
None, it's perfectly happy being broken, it's the fitting that has to change.
Only one but they'll insist on going through about 5 bulbs before they find one that suits this particular room and situation.
Just one, but the light bulb is going to need to change itself.
Just one, but first the tire really has to want to change.
