Cougra you are so right. I have seen bulbs that were advertized to be of a certain K and then when put on a scope, were something completely different. Thats why I always wait for the testing before I jump in on a new bulb.
Scooter its a tough subject with alot of different varables, good luck
Wit/Troy I have forgotten more then I remember
Mike, strong questions let me see if I can explain.
On the sources I will dig a few up for you but do some searches on GFP like protiens, and Fluorescent Pocilloporin pigments and carotenoid pigments within the Symbiodinium algae, this will give you a good start.
Mike thier are Pocilloporins pigements with in the coral that are only stimulated by the presence of UV-A and UV-B. In corals that are directly exposed to this (say on reef tops) the protien (pigment) is produced to be utilized as a protectorant (most are clear). In deeper waters it has been found that these pigments can fluoresce UV-A and violet light into more photosynthetically useable light.
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Also with what you said abou the the pigments taking one wavelength and emitting a different better useable wavelength, wouldn't that mean a bulb with more of peaks in the green range cause a coral to emit more blue? Where as a bulb that has a major peak at 420nm would result in a less blue coral because the pigments wouldn't need to convert any useable light?
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Mike most of that is associated with the presence of UV's. at deeper levels. Here is the general concept. Thier about 3 major protien based pigments that are know. each absorbs light at a particluar range of wave length, in turn they fluoresce at a slightly higher wave length, were talking 10 to 30 MN, so not a sweeping change, but enough to add to the total of the light. Again how this all looks to the human eye is a completely different subject.
Mike