Lights on for how long ?

[FitoPharmer]

remember, corals come from equatorial regions. so they can have 12 hours of daylight. I would say your corals should be fine with your current PC's being on 12 hours or a few more 11am-11pm. defiantly get a timer, I find corals like a more regular light schedule then you could provide by hand. if you have bad viewing hours, get really good actinic LEDs and buy florescent corals, they look better at night/morning. Once you upgrade 12-14 hours might be too much for lower light corals if you keep them, or impact on algae growth.