Need advice on LED mix

[oreo57]

Surprise surprise...

Abstract

Pocillopora damicornis (Linnaeus) and Montipora verrucosa (Lamarck) were collected from Hawaiian reefs. In two experiments (September 1979-January 1980: ca. 4 mo; August-October 1980; ca. 2 mo), these reef corals were grown under sunlight passed through filters producing light fields of similar quantum flux but different spectral composition. In vitro cultures of symbiotic zooxanthellae (Symbiodinium microadriaticum Freudenthal) from M. verrucosa were cultured under similar conditions for 15 d. Blue or white light promoted more coral skeletal growth than green or red light. In both coral species, blue light increased the total amount of chlorophyll a of the coral-zooxanthellae association. In the perforate species, M. verrucosa, the pigment concentration was elevated by an increase in the density of zooxanthellae, but the pigment concentrations per algal cell remained unchanged; in the non-perforate species, P. damicornis, it appears that pigment concentration was elevated by an increase in pigment per algal cell, and not by an increase in density of zooxanthellae. The “sunloving” reef-flat coral P. damicornis did not grow as rapidly as the “shade-species” M. verrucosa at the low quantum flux (about 10% sunlight) provided by the experimental treatments. The in vitro cultures of zooxanthellae from M. verrucosa exhibited growth rates in light of altered spectral quality that correlated with the responses of the host coral species: blue and white light supported significantly greater growth than green light, and red light resulted in the lowest growth rate.

http://link.springer.com/article/10.1007/BF00393009

 

[oreo57]

There was quite a lot of such research. For example:
C.D'Angelo, J.Wiedenmann, Blue light and its importance for the colors of stony corals, Coral Magazine, Nov./Dec. 2011

As digest of this study (and many other about related questions) I advice to read our first article on AA: http://www.advancedaquarist.com/2012/10/aafeature

See above..

 

[karimwassef]

Very nice. Now we're getting somewhere...

 

[SoFloReefer]

Time to hijack back my thread haha...

I made the modifications to my existing fixture- I scrapped the defective Meanwell ELN drivers and am not running 6 independent strings with the LDD drivers. They are controlled by a StormX controller. The only issue I have now is that the black optics shown are 60 degrees and the last 5 inches of my tank on each side are not getting light. I am thinking of changing them to 80 degree optics.

There is a window in the front of the fixture that was sized for the original controls which included several potentiometers. I'm going to lay out a insert that will fit the StormX and have it made using black acrylic. I'm thinking of using Ponoko.com to do that.