I wrote up my lighting schedule in response to a post on Leonardo's Lagoon's thread and thought I'd share it here as well for some feedback and/or comments.
I'm using a controller (ReefKeeper Elite) and I have the lights timed to do what I think is a good replica of the daily light cycle in nature. I am using an aqualight pro 72" retrofit kit with actinic tubes and 20,000 K XM bulbs
Does anyone else do something similar?
Here's my light cycle:
1) 7am - moon LEDs turn off. Refuge light turns off. 4 actinic tubes turn on in the back of the tank
2) 8 am - front actinics turn on.
3) 12pm - left MH turns on
4) 1pm center MH turns on
5) 2pm right MH turns on
6) 5pm left MH turns off
7) 6pm center MH turns off
8) 7pm right MH turns off, refugium light turns onn
9) 10pm front actinics go off
10) 11pm back actinics go off, moonlight LEDs power on.
Visually this is that it looks like in the main tank. (I tried to draw larger graphics, but the message board removes multiple blank spaces together, so I had to shrink it and compress)
(pluses (+) are on, minuses (-) are off
1) 7 am
++++++++++++++ (actinics)
++++++++++++++
------ ------ ------ (halides)
------------------------- (actinics)
-------------------------
2) 8 am
++++++++++++++
++++++++++++++
------ ------ ------
++++++++++++++
++++++++++++++
3) 12 pm
++++++++++++++
++++++++++++++
+++ ------ ------
++++++++++++++
++++++++++++++
4) 1 pm
++++++++++++++
++++++++++++++
+++ +++ ------
++++++++++++++
++++++++++++++
5) 2 pm
++++++++++++++
++++++++++++++
+++ +++ +++
++++++++++++++
++++++++++++++
6) 5 pm
++++++++++++++
++++++++++++++
------ +++ +++
++++++++++++++
++++++++++++++
7) 6 pm
++++++++++++++
++++++++++++++
------ ------ +++
++++++++++++++
++++++++++++++
8) 7 pm
++++++++++++++
++++++++++++++
------ ------ ------
++++++++++++++
++++++++++++++
9) 10 pm
++++++++++++++
++++++++++++++
------ ------ ------
-------------------------
-------------------------
10) 11pm - * are moonlight LEDS
-------------------------
-------------------------
--- * * --- * * ---
-------------------------
-------------------------
I believe this replicates the dusk to dawn effect, including the sun's trajectory in the sky, though I just realized I make the sun rise in the west and set in the east

A bit backwards... my OCD may eventually make me reverse the order of the sun's path
Would love some feedback.
Best, Itay.