Here's some additional shots of the lighting system.
This first one shows how the lights can be lifted straight up by the actuator. A lift all the way to the ceiling takes just under 1 minute. That's the up/down controller that is laying on the bar in the front. I have some plans for that thing...
This is a side view showing how the lights can be rolled backward along the overhead tracks. The lights will go back another 2 feet, but the mess of power cords is currently pulling the lights back to this position each time I let go of them. I suppose that is a good indication of how smoothly they roll.
All in all...I can't believe that it actually works. I'm no engineer...I just made this stuff up and it actually works.
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400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
My Tank:
http://www.canreef.com/vbulletin/showthread.php?t=28436