None. It will change when the fire nation attacks
One to screw in the lightbulb, stock four carts of supplies, and handle seventeen simultaneous customers at any one time for five consecutive hours.
Zero. They just keep praising and negging it, and then get upset when it doesn't screw.
OVER 9000
A: We can see no need for uninstallation and have therefore made no provision for light bulbs to be removed.