Schrodinger tells us that at any instant in time, the probability of there being a HalfBaker's cat present to screw in the bulb is not zero. No Halfbakers need to sit and wait for the cat because we know that over time the sum of the probabilities will total certainty. The answer is therefore zero.

All you need is a long pole with a sink plunger on the end. Once [Po] has finished using the pole to paint her ceiling, wedge the bulb in place and planetary rotation will take care of the rest.

One to give a long and vague explanation of how he or she
plans others to do it. One to explain why it can't work. One to
give a link with the title "baked", and the last one to remark
that there's a spelling mistake in the title.