a regular light bulb-no.
yes
faster light is red color light
Only if you buy a "full spectrum" of "grow light" type of compact bulb.
the color should be yellow so it can represent the color of the sun rays
No, but make sure the tree has enough light as well as space to grow. Also saplings can only be planted on dirt or grass blocks.
yes
No.
in summer
no it doesnt
it grows faster
sun light
Yes you can use it.