Answer:
Though blind as well, can lead the blind well.
There are several different kinds, but the one you pick doesn't do its job. What is it?
White fat and fluffy, May even look like a puppy. Seems heavy but is light, Floats about without a worry, But if it turns dark you have to hurry!
I am the hole in the night, the ever watchful eye. I return in a cycle, to enlighten the sky.
You saw me where I never was and where I could not be. And yet within that very place, my face you often see.
People take me on walks and I run and have fun. What am I?