Lush Decor Gray Prima Window Curtains Panel Set for Living, Dining Room, Bedroom (Pair), 54 x 84-inch, 54" W x 95" L, White & Black

It says these are insulated but are they insulated enough to be blackout curtains or do they let a lot of light through?

Are these panels 84" long

Does a set of two mean two separate panels for one window or two sets meaning you can cover two windows? I have two windows to cover.

Is the blue shade more of a baby or sky blue OR a aqua blue??