Refractions
Refraction of sunlight in raindrops
Diving
So they can see where they are going
A Meringue-u-tang!!! Note: I know it's spelled Orangutan.
A hot rod. NOTE: When I was about 5, I thought this was the funniest joke on earth.
An account*ant*.
A Humblebee.
Violet
Hue hue hue
Prism (Note: I made this joke up. Sorry if this little note refracts from the humour.)
Because it's inefficient!
An engi-near!
Because he always seemed to get hung up on addition.
None. There are no light bulbs in the closet. Another one: Why is Justin Bieber so pale Because there's no light inside the closet
Just two, but you're going to need a lot of patience and light bulbs.
Naughty by Nature
Because he thinks they're part of the illumi-naughty