Answer:
Different lights do make me strange, thus into different sizes I will change.
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
What loses its head in the morning and gets it back at night?
What is often returned, but never borrowed/
What kind of running means walking?
In your fire you hear me scream! Creaking and whining yet I am dead before you lay me in your hearth.