[DRZL]

Quote: Originally Posted by Pseudo Color changes in SPS due to Lighting Spectrum. The color spectrum plays an important role in coral coloration. Different kelvin bulbs will change the way corals color up. Certain sps are from different levels of the reef (deepwater acros, shallow fringe reef sps and so on). They are used to differnet spectrums from the sun due to the saturation of light through water. But different wattages of the same kelvin bulb will give you different results. A 175W 20k bulb has a different PAR rating than a 1000W 20k bulbs. Here is where intensity comes in. Kasei

Just wanted to add this Tyree article about spectrums and the lack of which are present in most bulbs and ways to supplement correctly. Lighting is one of those complicated subjects I feel everyone is tweaking, and unless your filthy rich or live in Japan, having 12 different MH colors over one tank is not really relevant

Steve Tyree
Stony Coral Pigments, Algae Pigments and Captive Lighting

http://www.reefs.org/library/talklog...ee_060202.html