i was told uv bulbs were good and they did ok for about 9 months before wearing out.t5's are supposed to last longer.so i got GIESEMANN
bulbs this time and so far i'm happy but its only been 3 months so i'll know in like 6 months if their better,as advertised i wish i could test them cause i think their brighter.i raised my light 2 inches higher off the tank and the corals seemed healthier.i have 2 54watt 11,oook t5's and 2 actinics over a 55 gallon tank and i think its to bright for a few of my corals.they expanded better after i raised the light.
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55 gallon reef with 4x54 watt t5,29 gallon sump,red lobo,2 toadstools 1purple and 1neon,gsp,xenia and yellow xenia,mushrooms,lavendar frilly shrooms,cabbage coral,yellow polyps,many zoos, orange and one neon green nepthia,duncans.mandarin goby | 
