Answer:
What is that which, though black itself, enlightens the world without burning?
I have one, you have one. If you remove the first letter, a bit remains. If you remove the second, bit still remains. If you remove the third, it still remains.
What has roots as nobody sees, is taller than trees. Up, up it goes, and yet never grows?
What is up thatβs also down? Whatβs a smile and a frown?
A mighty weapon in the war against winged household pests.
I am used for light yet I am solid. Without me you would feel enclosed. I hate being touched especially with a lot of force. I like to be in buildings.