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Originally Posted by mike31154
I did a little more digging re the UV issue & found this article. They've carried out some measurements on various bulb types, technologies, their UV output & how much UV-A in particular actually makes it through some of the so called glass shields that envelop lamps. UV-B & -C are downright nasty & can really hurt you as well as most any living thing.
http://www.aquarium-design.com/reef/uvlighting.html |
That's an interesting article on UV! So in other words. 1. the uv shields on halide bulbs only block out some UV and by some I mean hardly any. 2. UV is harmful to corals.