When lighting a sloped wall or a tight space, consider fiber optics. Light from a projector travels through fiber optic strands to a glass brick or other fixture. One line voltage lamp can operate up to 20 glass bricks as bounce light or accents lights. In a mural, individual fiber optic strands create stars for dramatic effect.
To get rid of drilling debris from holes you are making in masonry for anchors, use a section of small plastic tubing about 2 ft. long. By inserting one end of the hose into the hole and then blowing through the other end, you will be able to get rid of the drilling dust without getting any of it in your eyes.