Answer:
A device for finding furniture in the dark.
What is so fragile that saying its name breaks it?
Looks like water, but it's heat. Sits on sand, lays on concrete. A play on the eyes, but it's all lies.
I weaken all men for hours each day. I show you strange visions while you are away. I take you by night, by day take you back. None suffer to have me, but do from my lack.
What is neither inside the house nor outside the house but a necessity for any home?
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.