I overheard something interesting at an LFS the other day. The guy was saying that the key to producing very colorful corals is to have a ton of light. Usually more so than the amount required for them to grow. He continued to say that the reasoning for this was because the corals produce those color pigments as a sort of defense mechanism to the strong light. I was thinking about how humans produce melanin as a defense against uv radatiation and from that point of view, what he said kind of made sense. Then again, I always thought giving corals too much light would just bleach them. I'm confused. What do you guys think?