Size is important too. It’s important for the bracket to properly support the shelf that it’s holding up. A common mistake is to buy brackets that are either to big or too small for the shelves. If they’re too big then they’ll stick out, and if they’re too small then the shelf could be unstable and dangerous. The projection of the bracket (the part that sticks out from the wall and holds the shelf) should extend to within an inch of the outer edge of the shelf.
Ambient lighting can be accomplished be placing small halogen bulbs at the back of the painting or decoration pieces housed in their cabinet sections. The textures chosen for this should be as follows. The wall should be painted with a very smooth finish emulsion, wallpapers should be avoided here, and the decoration pieces with their shelves should be dull and matted. They should not be shinny and glittery. Basically their security level should be kept in check.