Quote:
Originally posted by Arthur1
I'll keep this short  Last I knew corals grew faster under a lower K down to 6500k if memory serves me right. Also I believe the survival rate under a higher K rating shouldnt be suprising to anyone since they adapt better to the blue lighting. When I first started many moons ago (cough) lol I remember having to place a lot of sps on the substrate when I first recieved them b/c the lower K bulbs would "burn" them.
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Actually there is a classic study by Kinzie showing redder spectrum has lower growth in Montipora
"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".
Kinzie III, R.A., Jokiel, P.L., York, R., 1984. Effect of light of altered
spectral composition on coral zooxanthellae associations and
zooxanthellae in vitro. Mar. Biol. 78, 239–248.