Where does light go (when it goes out)

I saw a catfish in a book
And I saw a picture that's done been took
The only thing I really wonder about
Is where does the light go when it goes out

Did you ever see a big horse fly
I guess there's a pasteur up in the sky
I bet he's up there feelin' his oats
And showin' his heels to the lunar goats

I know he likes to run and play
And he chases the cows on the milkyway
These things are true I have no doubt
But where does the light go when it goes out

Once I saw a walking cane
I saw a window that had a pane
I know you get down off of a dump
But you don't get butter from a buttercup

A parakeet is only one
And a barrel of monkeys is a crowded bunch of monkies
The only thing I really wonder about
Is where does the light go when it goes out

If a lover's quarrel is just a little spat
Then a dandelion is a big sweet cat
You can't get tea from a teepee
But you can get a bark from a dogwood tree

Hail eagle is a sick ole bird
And superkalafragelistic is a big ole word
But the one thing I really wonder about
Is where does the light go when it goes out

You know it seems to be a mystery
That you can't get a coke from a coconut tree
You might see a catfish down by the hole
But you never did tell me how he held his pole

You can get a scent from a poor little skunk
But carry your clothes in a elephant's trunk
The only thing I really wonder about
Is where does the light go when it goes out