In the light, I may reflect. In the dark, I'm cold and wet. What am I?

Answer: Water

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More What am I ?

In the morning I sing on feathered wing. I soar through the air without a care. What am I?
Island hello. What am I?
It can be said: To be gold is to be good; To be stone is to be nothing; To be glass is to be fragile; To be cold is to be cruel; Unmetaphored, what am I?
It comes only before, It comes only after, Rises only in darkness, But rises only in light. It is always the same, But is yet always different. What am I?
It has a long neck, A name of a bird, Feeds on cargo of ships, It’s not alive. What am I?
It is sharp but not pepper; white but not paper; green but not shaddock. What am I?
It's hard to see me when I'm working. It's hard to see when I'm not working. Keep me wet or I'll be uncomfortable. I spend a lot of time around balls. What am I?
Keep doing me to avoid lens dryness. What am I?
Kids, elders and a monster love me, I’m mostly round and brown if you ask me. What am I?
Kings and queens may cling to power, and the jesters may have their call. I am the most common but I can rule them all. What am I?
Light me up for a sprinkle of gold. What am I?
Light me up in backyard gatherings. What am I?