Is my marine lighting duration too much?

[nemokit]

Hi,

I am using MH (main lighting) and 02 actinic blue LED. My MH will usually provide 8hrs of light while my 2 LED will only provide supplement lighting before MH starts and end.

• BLUE (0800 - 1100)hrs (dawn)
• MH (1000 - 1800)hrs (day - 8hrs)
• BLUE (1700 - 2000)hrs (dusk)

Based on calculation, it exceeded the "between 6-8hrs" lighting requirements. Mine starts from 0800 to 2000 (12hrs). I assumed that the blue light will cause less damaging effect to the tank (i.e: nuisance algae growth) hence, it should be alright. Is it too much?

[asg]

Bro. Depend on what coral u have ah

[nemokit]

My tank now has soft corals like a few mushrooms, anemone and a branch hammer. On SPS are just 2 small frags bought a few months before.

[Harlequinmania]

Did you see any ill effect on your coral or algae bloom so far? If not, you can stick to it. Usually 6 to 8 hour of full spectrum of light is enough and supplement by 10 to 12 hour of blue including the night for viewing pleasure if you wish.