The popular choice in bulbs/specrum these days seems to be white/blue(12-14k).Most of these bulbs have spectral peaks high in the purple/blue pectrum(420-460nm).Chlorophyll A present in zooxanthellae has maximum absorption around 440nm and around 640nm(red)Chlorophyll B has absorption peaks that are similiar..It seems alot of the bulbs in the market today dont have much output in the red(650nm) spectrum.Obviously corals will grow with mostly blue light but does anyone feel that this other spectrum should be provided to increase photosynthesis rates?
One of the common arguments,is that the red spectrum is the first to be filtered out as depth increases.This is indeed true,but aren't most of our corals collected in somewhat shallow depths in reefs/lagoons that are near shore where they would be subjected to red light.
What is your view/opinion on this subject?What has your experience been while using different bulbs with different spectral peaks?