None. That's a hardware problem.
It doesn't matter.
Er two. Or maybe one. No --- on second thoughts make that two. Is that okay with you
Six-1 to change the bulb and 5 to sing about how much they miss the old one.
Just two, but you're going to need a lot of patience and light bulbs.
He followed the shampoo instructions.
He just needed a little bit of Clojure.
None that's a hardware problem