I can fill a room but take up no space. Look out at night, and I am in no place. What am I?

Answer: light

More What am I ? with answers

More What am I ?

I can fill any space, float, and disappear. Never touching the ground I help others get around. What am I?
I can fly but have no wings. I can cry but I have no eyes. Wherever I go, darkness follows me. What am I?
I can fly but I am not a bird, I am colorful but I am not a rainbow, I am beautiful and social but I am not a person. What am I?
I can generate fear and some say I come out of your ears. I am as quiet as a mouse but not welcomed in the house. What am I?
I can generate fear and some say I come out of your ears. I am as quite as a mouse but not welcomed in the house. What am I?
I can have any and all colors that exist, and yet I show none. My size and strength are immeasurably immense, and yet I am invisible to the naked eye. What am I?
I can help you to mend. I hide my body but never my head. What am I?
I can honk without using a horn. What am I?
I can invent dreams or open the skies. It's easy to use me, just close your eyes. What am I?
I can kill people, or cause great pain. You eat me. I can mean you’re crazy. I hold things together. I help climbers stay safe. I can replace a swear. And I’m on a violin. What am I?
I can never be stolen from you. I am owned by everyone. Some have more, some have less. What am I?
I can only be played on a windy day. What am I?