I want to replace the burnt out pool light with an LED. I saw a few how-to videos and everything seemed pretty straight forward. However, when I got to my pool light, it doesn't look like any of the ones I saw on the videos. I'm looking for the 1 screw that holds the ring/bezel, but instead I have this (see pics). The flat-head brass color screw was covered with plaster before I exposed it. Any ideas on how to remove/replace this light? is it an older model? or just a bad install job? this is going to be my second summer as a pool owner, any help would be appreciated.