extended photoperiod?

[ReeferBatman]

As far as I know photo-inhibition is a function of intensity rather than duration.

Combination of both.

Less intense light for longer duration, or vice versa.

Example... Recently I added another Blue LED strip [to stay on all day]. I was surprised to find that some corals started receding after a few weeks... FROM THE ADDITION OF ONLY BLUE LIGHT. Had to shorten the photo-period of blue lights by a bit to give them more time to adjust...

Because it added more INTENSITY of the same already offered spectrum.

 

[JPMagyar]

As far as I know photo-inhibition is a function of intensity rather than duration.

Actually several studies have shown that duration is just as much a limit as intensity, sadly I don't have time to search them out, but think of it this way: Could you run lights 24/7 and expect healthy coral? I haven't tried it, but I'm gonna guess that would not work so the question is how long can corals maintain respiration before they need a rest?


Joe :beer:

 

[barjam]

Actually several studies have shown that duration is just as much a limit as intensity, sadly I don't have time to search them out, but think of it this way: Could you run lights 24/7 and expect healthy coral? I haven't tried it, but I'm gonna guess that would not work so the question is how long can corals maintain respiration before they need a rest?


Joe :beer:

My light timer broke the other day and my lights stayed on for 24+ hours and bleached most of my corals. Much different than working up to 24 I suppose.

 

[nikesb]

What about having light but not intense light for 16 hours and having them on a higher power for 6 hours?

 

[BeanAnimal]

What about having light but not intense light for 16 hours and having them on a higher power for 6 hours?

Coral (like most animals) needs a time to rest. During dark hours corals get rid of waste, feed, etc. The coral evolved to thrive under atural light cycles and even though our aquariums really share little in common with the ocean, will be healthier under similar lighting conditions.

 

[Terrance]

Wow I've been doing 11hrs of light. I'll cut it back to 8hrs of max lighting.