This is kinda funny but not funny, my Mom (yes I'm adult and I still capitalize Mom) is a botanist. Several of her friends and people who've worked at nurseries who supply the Dept have developed glaucoma (eyeball cancer is roughly how I understand it, but I'm out of the water on that one) and they all got it from repeated exposure to high pressure sodium lighting and metal halide lighting. And no, they didn't stand around staring at the light (Not THAT kind of botanical experimentation!!!), this was purely from just routine exposure. So Mom is a serious advocate on the whole canopy thing. It actually was her who jumped my case for exposing the baby to the halide pendant over my 58. So it took a plant freak to tell an ocean freak what should have been obvious... 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. I know it's a pretty benal thing to worry about, but after sitting at the dining room table, I have spots in my vision for hours. And that's just from what I catch on the peripheal. My partner is tall, so it doesn't bother him any, but I see the dog and they baby both wince from the aquarium area. Yet another reason to be anxious to get the project tank going (Getting good at justifying this, aren't I?)