You can still use the Prime HD's and have it as a peninsula. Instead of the 12" flex arm mounts, get a pair of hanging mount kits for them. Then get a 8-10' section of 3/8" diameter electrical conduit pipe, a pipe bender, pipe cutter (possibly borrow or rent these), a decorative endcap, mounting brackets and black spray paint. If you leave a small gap between the end of the tank and the wall you can mount the pipe to that, or down the stand depending on your setup. Next measure out where to put the bend ensuring you have enough horizontal distance to mount both lights off of it. Once you have the pipe bent drill the holes, two all the way through the pipe for the Prime hanging kits and two right next to them on the bottom side of the conduit only for the power cables. Once all that is done paint the pipe with several coats of paint and run a pair of strings through the pipe and use them to fish the power cables through the pipe. Mount the pipe up and then bolt the hanging kits up and mount the lights and then wrap the power cables around the support wires down to the lights. Plug everything in and viola a simple clean light mount for a peninsula tank with hidden wiring.