What Am I Riddles

Question: I only come out when I see lights My colour is opposite of white Mostly, you don’t realize that I’m with you If you leave me, I’ll keep follow you I’ll always copy whatever you do You can’t touch me and I can’t touch you What am I?

Question: What is black when you buy it, red when you use it, and gray when you throw it away?

Question: I had a bright start,
but I couldn't take the pressure.
I consume everything,
yet I don't eat anything.
What am I?

Question: I have a name that's not mine,
and no one cares about me in their prime.
People cry at my sight,
and lie by me all day and night.

What am I?

Question: You are my brother, but I am not your brother. Who am I?