i did a 3D model of the first one of those fans. if you want to remove the lightbulb, go to surface properties for the glass and turn transparancy up to 100%, then clone the working bulb and delete the bad ones. after that go to create new lights, make them area light maybe? turn the intensity up to 60%... also you'll have to turn the luminosity of the glass up some after you undo the transparency thing.
i would try turning the glass itself
