None. The average jw is not allowed to change bulbs. Further, the r&f are not able to find any new bulbs. Jehovah only gives light bulb finding privileges to the gb, and only every so often. When the gb miraculously finds a new light bulb, two thirds of them have to agree to it before it is changed. Then they all do it together. And presto! New light.
Old light bulbs are said to never burn out, their light is just added to by new bulbs. However really old light bulbs do seem to just fade away, out of existence, although nobody can remember how. Occasionaly, an old light bulb, barely flickering appears in a hapless dubs hands. Upon bringing its light to the attention of his fellows, they all declare that the flicker he sees isn't light at all, it is darkness, and he must have been wicked to draw attention to such evil. Then they all beat the crap out of him and cast him away. Shaking their heads, they all run back to safety of the crowd hanging around the newer light bulbs, just installed by the gb.
Sorry, it was a bit long. Are there any other religious light bulb jokes? or just bulb jokes?
SS