Polyp Extension and Lighting

[Volcano1]

I ran across an article saying that no polyp extension was a sign of to high lighting and over extension too low.
Is this true in your opinion, O seasoned SPS keepers?

Would any of these comments be true during the night also?
What say ye?

 

[kaserpick]

I have had Acros exhibit this kind of behavior before, almost no PE while too close to the light, and extreme PE while too far away from the light. BUT, like most things with this hobby, lighting is not the only thing that can affect PE. Starve a coral and the PE will be dismal, IME. Give it some nutrients (of course, not too much), and PE can and usually does improve. This is just my experience. I started SPS around 2009, so I'm no expert.

 

[williewilliams]

I don't think that concept is founded. I have corals with crazy PE right under a 250w radium, if that was true that coral would need to be 1 inch from a 1000w lamp. I think that the wrong amount of light will effect the coral badly, but good PE is usually a sign everything is happy. Too little light most sps is not happy. Just my 2 cents.

 

[sanchoy]

Every sps are different. Some love light, some hate too much light. So you cant catergorize all sps into one category. So to put it, some love, some hate it.

 

[Bela N]

. . . . some hate too much light. . . . . . .

Is there a published list of "high light hating" SPS? Would love a list or a link.

Thanks

 

[Volcano1]

I guess the theroy behind it was too much light, polyps retract because they don't need to capture food to keep coral alive, it has enough, or more than enough light, so polyps retract.
Just the opposite is true if not enough light. Polyps over expand to capture more food, because it needs it without the supplemental photosynthis.

Not my baby, just summerizing what the argument was.Trying to see if people thought it was valid.