These pucks were very easy to install - just a few screws and they were secure.  We installed them in our large shed- in the lower area and the lofts.  They really gave off a lot of light for a small disk.  The remote made it very easy to turn them off and on which gave us lots of light for the entire building.  If you just want on a certain light you can just push on the disk and it will light on and off.  Perfect pack of 6 for our needs.