Whatever you say pro. Which isn't much.

It's clear you don't. You are arrogant about anecdotal nonsense from 07.
We have long since moved on from kelvin ratings.

+KYfishguy

I'm both. and I cited my info to Stealthballer.

+stealthballer
I don't think you fully understand lighting.
The NM ratings are only for UltraViolet Lighting. Ultraviolet lighting is mainly for looks. Yes, some bottom dwelling corals such as Clams, etc,,, use this because UltraViolet penetrates farther down below the water surface. But the majority of Corals thrive the most between the Kelvin of 6800K to 18,000K with the Kelvin between 10,000K and 18,000K being the preferred range. Chlorophyll is only produced during daylight hours is it not? Photosynthesis occurs only in the presence of daylight. Actinics are so highly misunderstood from so much bad info out there these days. WetWebMedia has the info I stated from the experts all throughout the Reef Lighting Section. Here is the link and quote from the forum.

http://www.wetwebmedia.com/marine/setup/lighting/actinicfaqs.htm

About the 48th thread down:

Quote:
Actinics - necessity in the reef? 1/08/07 Hi Guys, <Hello, Jason. Graham with you tonight.> I had a quick question about lighting, I currently have both a 4x96w PC kit with a dual daylight and a dual actinic. <plenty of light for a 30gal. Enough as far as I can tell, without a species list.> I have recently acquired a 1x175w 14k MH kit that I am going to install as I like the color better. <Wow, does acquired mean free?> Would my tank benefit if I kept the actinics in along with the MH? <Yes and no. Actually, I think that this topic is well covered here in the FAQs. http://wetwebmedia.com/marine/setup/lighting/actinicfaqs.htm Suffice to say that corals don't grow from the presence of actinic (420-450nm) light. They require light in the daylight spectra to really kick-butt. Don't forget to acclimatize the sessiles to the HID lighting!>> Also, I do currently have an assortment of corals. Sorry I forgot to mention, its a 30gal tank. I will probably be upgrading soon to something bigger. <I do love upgrades... fun!> Thanks for your help and keep up the great work. Thanks again, Jay <Thank you for the kind words, Jason. Happy lighting! -Graham T.>

Peaks are at 420-460 and then I forget what the red end peaks are at for chlorophyll, but that means you are wrong and I have seen some evidences that 380-419nm maybe also be beneficial

+COMINATYALIVE Can you cite your knowledge or are you just an armchair expert?