HEY its a japanese thing...leave me alone OK ok I will go dig it up.How does a Halogen Lamp that is producing mostly Red and IR light, end up producing UV-A1 "violet light", in the Ultra region and then turn it into red light. Must be via FM Or am I missing something here Only about .2 % of a Halogen lamp is UV. They can appear violet to purplish but that is due to a slight absorbtion in the green band by iodine vapor
Originally posted by Boomer
I guess I can't really measure how much "better" my corals were colored though, or how the pocilloporin in the corals in my tank reacted to the change in bulbs.
Tha is the misleading issue. Sure corals will change due to dif lighting but that change in color, to which "you like", means nothing to the coral, they only cares about growth and reproduction,etc... Some where reefers have gotten the idea that if the coral looks better to them, they must be doing better, when in fact they many be doing worse.
It was also recently discovered that corals containing high densities of fluorescing pigments were less sensitive to coral bleaching that was induced by photo damage to the photosynthetic apparatus within the corals algae.
growth is a good one for sure although I have seen, them growing on one end and dieing on the other at the same time, lol. A few years ago I went to aan all radium lighting arrangement (all 400 watt 20K's) I loved the look of the tank and my acro coloration was just beautiful.... I was a happy puppy. As time passed by, I began to notice that my growth rates had severly decreased, I would guess by around 75%. I then began to notice that alot of them were forming larger and larger bleaching areas lower and on the underside of branches. Even though I loved the colors of the corals I changed my lighting back to its original configuration (mix of 20K radiums and 10K Ushio) , the color is still very good (not as intence as it was ) but the corals have once again began to show great growth and the bleached areas have repopulated.I guess those white growth tips are my best clue as to the health of my corals, unless one day/night I happen to see a spawn event occur in my tank.
Originally posted by Boomer
So yes it is misleading to a degree
Have you read this;
http://reefkeeping.com/issues/2003-11/eb/index.htm
I guess one other thing to keep in mind also would be:The primary control on their production appears to be total irradiance level, and little evidence exists to suggest that the "k" rating of bulbs will influence their production. There is also a strong genetic component, although the specific aspects of fluorescing proteins and their respective genes have not yet been worked out. The color temperature of light bulbs most likely influences the perceived color of corals in a tank, with ultraviolet components enhancing highly fluorescent pigments. Certain bulb temperatures may have enough of their spectrum skewed in relative distribution that total irradiance with a given wattage may be affected, and thus total irradiance influencing the relative production of fluorescing proteins.
coloration is largely aesthetic for reef aquariums.