great set up you have there!
Have you ever thought of malking a shroud around the light fixture that goes up to the area where your ballast are and hang the light from that - thus hiding the power wires, and the hanging wire that goes up to the ceiling?
Originally, I thought of building some sort of a floating canopy (cantilever) off of the relatively small piece of wall above the tank. (3 1/2' ht) I actually purchased 3 large lumen bright fixtures, that I planned on "hiding" along with the various cables, and ballasts.
Once I actually had these big reflectors in hand I decided it wasn't the look I wanted for the space. I didn't want my tank to be overtaken by the light(s) and/or whatever was going to hide the ugly fixtures.
Instead, I chose the Giesemann Spectra because of it's sleekness, and relative ease of working with it over an open aquarium. I did not want the space around the tank to be cluttered - especially with the openness of the surrounding rooms and second story.
<a href="http://s49.photobucket.com/albums/f278/summerofmyyouth/?action=view¤t=IMG_1635.jpg" target="_blank"><img src="http://i49.photobucket.com/albums/f278/summerofmyyouth/IMG_1635.jpg" border="0" alt="view from GR"></a>
This picture shows how small the hangers are holding-up the Spectra. We decided not to hang from the ceiling, and included an extra "safety" device with the longer, white metal screws in case the first ones (Giesemann's) ever failed.
<a href="http://s49.photobucket.com/albums/f278/summerofmyyouth/?action=view¤t=IMG_1648.jpg" target="_blank"><img src="http://i49.photobucket.com/albums/f278/summerofmyyouth/IMG_1648.jpg" border="0" alt="6' Spectra"></a>