Hello -- I'm adding some fluorescent strips to the walls of a small home office, to give me some indirect lighting. My plan was to use standard "portable" lumiares (i.e. with cord and plug, no junction box in the unit), and put a wall outlet behind the valance.
Now, as I lay it out on the wall I find that the outlet peeks out below the lower edge of the valance. Is it acceptable to rotate a box 90 degrees, so it's horizontal instead of vertical in the wall? That would make it short enough to be hidden. Are there any other options?