Here are some pics of the pendant on the tank. Top view shows the light sitting on a stainless steel grid inset into a wooden frame. I don't know how you would go about this setup on a rectangular tank. My 90 gal. is a corner bow front with 36" of depth. I took out the back row of T5's for the pendant.
Anyhow this is what I did, good luck.

http://i263.photobucket.com/albums/i...lot57/tank.jpg

http://i263.photobucket.com/albums/i...ot57/front.jpg

http://i263.photobucket.com/albums/i...ot57/light.jpg

That looks great! I had not seen those little pendants, I may have to look into one and figure a way to mount it. Nice thing is you still get the color of your T5, but have some shimmer, and a place where you can more easily put your SPS. Thanks for the pics, awesome looking tank!