Where was that study on 20,000K halides vs. lower K halides for SPS growth?

[redfishsc]

There was a study a while back comparing the growth rate of some SPS, comparing the 20,000K and the lower K bulbs.


It showed that the 20,000K bulbs actually produced better growth. I think Sprung was one of the contributors, if not the lead man, on this one.


Can anyone help me find the link?

[stanlalee]

http://www.advancedaquarist.com/2008/12/aafeature1

they didn't really conclude it was the blue spectrum or the 20k lighting in particular that was responsible for the increased growth. They did find red light INHIBITED growth and its much more likely 20k bulbs would have less red light then other kelvin bulbs but not garaunteed. Plus they didn't test enough corals from enough depths do be conclusive. that said anybody with 20k bulbs knows they grow corals just fine despite what test equipment or paper data results may conclude.

[redfishsc]

<a href=showthread.php?s=&postid=15636247#post15636247 target=_blank>Originally posted</a> by stanlalee
http://www.advancedaquarist.com/2008/12/aafeature1

they didn't really conclude it was the blue spectrum or the 20k lighting in particular that was responsible for the increased growth. They did find red light INHIBITED growth and its much more likely 20k bulbs would have less red light then other kelvin bulbs but not garaunteed. Plus they didn't test enough corals from enough depths do be conclusive. that said anybody with 20k bulbs knows they grow corals just fine despite what test equipment or paper data results may conclude.


That's IT! Thanks!!

And you are right about testing corals from different depths. I would bet that a lot of the crocea and maxima clams benefit from red spectrum, as a lot of soft corals as well.