“Really like the selectable color and brightness of these ceiling lights. I tempoarily mounted them by stringing a zip tie through the spring-loaded wings, hanging them from a deck screw in my ceiling joists, then wiring. Once they were all mounted this way I could play with color and brighness to get the levels desired. I will mark their location on the floor using a plumb bob, remove the wafers, install the drywall, and then drill the holes up into the cieling to "reacquaint" the wafer with the power supply. One drag is that the hole saw needed is 4-1/4" and I had a 4" hole saw already. Needed to purchase a new specific size. But OK - minor drawback. Still 5 stars.”