[guenther]

What you can do instead of the adhesive is take a short drywall screw with a washer and screw it in to the spot where the tab broke on the light. Leave about 1/2" exposed and have the washer slip behind first (like the tab did) then push in the side with the regular screw to hold the assembly in place. It works perfect and is what the re-manufacturers of lights do when the tabs are broken.