That looks really cool. I like the dispay fuge part! I just broke down my 55 because I got a 75 but that light is affordable for you but in the long run, it's more affordable and better for your tank to get the LEDs on e-bay. get two, 120w Dimmables. Then just grab 2 dial timers and forget about it. It makes it so much easier. Complete darkness at night (besides just the TV on) but I feel like the tanks need that. Also, You can always get a little moonlight or something if you want.
Can you get a closer pic of the DT, I hated scaping my 55 since it was so narrow, best of luck following along!