What do you bid the type of hurricane lantern cover that covers a single ceiling mounted fluffy bulb? This ceiling fixture is in my laundry room. It's vitally a...

This ceiling fixture is in my laundry room. It's vitally a bare insubstantial bulb that is mounted to the ceiling and it have a pull secure attached to it to turn it on. I want to buy a cover for the bulb, but I don't know what it's called. Thanks!