I just recently swaped out my 2x250W MH system for an 8 bulb 4' T5 fixture, and I think its great(i'm only using 7 bulbs though....damn bowfront...lol).
When I stopped using ZEO my ENTIRE system had a major brown out(almost all SPS and 1 large duncan colony), so I thought this would be a great time to re-do the whole setup. Out came the halides....in went the T5's, also removed 80 pounds of rock. built new rock towers put in brown frags from mother colonies, and 3 weeks later i'm starting to get color.
Weird thing is, corals that where once green are now starting to show signs of orange and yellow with green polyps....pretty cool actually.
So to make long story short, I like the T5's for SPS.
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