Question: How many writers does it take to change a light bulb?

Answer:

a) Who needs a light bulb? the glow of my computer screen will do just nicely.

b) Who needs a light bulb? my mind is illuminated from within.

c) Stuff it, it only adds to the heat anyway.

d) Oh look, the light's gone. I'll have a cup of tea, then I'll change it and then I'll sit down and do some work...