if you own i fixture for these bulbs, then you know they just aren't that bright. so don't expect these to make your hard corals to grow. it's not the bulb, you just need more power, or a t5.
Buy Coral Sun Bulb for Aquariums Now
I have a 120-gallon freshwater aquarium with a few large shubunkins and a mix of artificial and live plants. The aquarium was lit by a pair of 24" 8000k fluorescents in separate 30" hoods, set end-to-end over the length of the 5-foot long tank. I purchased a pair of these ZooMed Coral Sun Actinic bulbs primarily to provide some supplemental lighting for the plants. I installed them in an additional pair of 30" hoods. The addition of the blue light output from the ZooMed bulbs to the existing 8000K fluorescents, really made a difference in the overall color balance. The gravel and plants took on a more natural, less yellowish look and the colors of the fish were also enhanced. So, in addition to helping the plants, the aesthetics were much improved as well. In the evening, I shut down the 8000K bulbs and just leave the actinics on for awhile before turning everything off for the night. The ZooMed actinics provide a cool moonlight effect when used by themselves. Great product and highly recommended for my application. The lamp was delivered very quickly and arrived in great condition. Also, it seems to work well and looks great in the aquarium! I would highly recommend this product and seller to others.
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