Answer:
What has a spot and is very bright, is sometimes, red, white, blue, yellow or green and is often blinding.
My first half is normally made of stone, my second is crazy, and I taste sweet when complete.
I'm not man's best friend, I'm their enemy, I can mark your end, yet you do not see me, I am very small, but very tough, If you have me, then you have it rough.
In your fire you hear me scream, creaking and whining, yet I am dead before you lay me in your hearth.
A box without hinges, lock or key, yet golden treasure lies within.
What an fill a room but takes up no space?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?