I know a SW Tank isn't like a FW tank, you can't just turn the lights on when you feel like it and turn them off when you want. Corals need a certin amount of light in a 24 hour period, I think, lol. What I have been researching on the web is to find out what theses times are, how long the lights need to be on in a 24 hour time frame and the only answer I can find is this:
Reef Tank Lighting "Rule of Thumb"
The simple "rule of thumb" explanation of the lighting requirements for corals is: Three and a half (3 1/2) watts of over 6700K lighting for each gallon of tank water for soft corals and four and a half (4 1/2) watts of over 6700K lighting for each gallon of tank water for hard corals. An example would be a 55 gallon tank would require 192.5 watts (55 X 3.5) of light for soft corals or 247.5 watts (55 X 4.5) for hard corals. There are exceptions to the rule of thumb (some coral species require more or less light than their hard or soft brethren), but for the most part, the "rule" is workable.
What does all of this mean??
Reef Tank Lighting "Rule of Thumb"
The simple "rule of thumb" explanation of the lighting requirements for corals is: Three and a half (3 1/2) watts of over 6700K lighting for each gallon of tank water for soft corals and four and a half (4 1/2) watts of over 6700K lighting for each gallon of tank water for hard corals. An example would be a 55 gallon tank would require 192.5 watts (55 X 3.5) of light for soft corals or 247.5 watts (55 X 4.5) for hard corals. There are exceptions to the rule of thumb (some coral species require more or less light than their hard or soft brethren), but for the most part, the "rule" is workable.
What does all of this mean??
Sorry I have absolutely no experience in SW, so I couldn't begin to fathom an answer to your question.