These are perfect! Regular sized bulbs will stick out, so I purchased the bulbs in the pictures. I had purchase compact bulbs through wayfair but they were still to large. I hung the shades up vs down even though it states to install with the shade down. Love the light they give off, not to bright but bright enough to softly luminaire them area. I would say there is cement than concrete only because the shades are smooth and any aggregate in them is really fine. Awesome product! Mine are installed on a traditional switch.