I will make your day great
But during the night I'll keep you up late.
Away the darkness runs from me
Just so that you may see.
By nature and by man I am made.
Call me and I'll come to your aid.
Even though you may try so much
You'll never touch.
I am faster than a speeding train,
Faster than any plane.
So who may I be?
You'll just have to guess and see.