reefs are under constant and brutal radiation, and just like fishermen who get cataracts in age, anybody who exposes themself to the same intensity of light, or even a close approximation, is risking their eyes
Is it the intensity of the light or the UV
radiation that causes the problem? Most MH
lighting for our tanks have a UV
glass shield which should minimize if not eliminate this risk.
I have a couple of corals that bleached white after going in my tank. They normally grow under intense sun so, after photo acclimating them, I placed them directly below my 150w MH
lights, high in the tank. I asked Anthony Calfo about this at a demo he did last month. He speculated that I do not have enough light in the UV
spectrum light for these corals.