Five. One to scour flea markets for the perfect vintage light bulb, one to collage over it with found papers, one to age it further with walnut crystals, one to give it nice highlights with Treasure Gold rub-ons and one to stick it in the socket with E6000 heavy-duty adhesive. It doesn't work but it looks wonderful and sells on Etsy.com for $45.
(I didn't write it, I saw it in a book and it cracked me up. It could be the Benadryl's fault, though)