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Originally Posted by BluePhish  i just bought the 48" 216 watt t5ho to replace my 260 watt pc. the light penetrates down to the sand of my 24" deep tank. the pc light penetrates about half that.the pc you actully see a huge difference you can see the light completely fade out at about 12" deep.the fan is loud i guess but no louder i would think than any other pc fan, dose not bother me. t5 bulbs are a lot cheaper and you have the option of upgrading reflectors,bulbs,and ballasts. | Are serious man? I have the 260 watt PC on a 55 gallon 18 inches deep with the lights 3" above the lid, and the light definitely goes all the way to the bottom. It doesn't fade at all after 12". How old were your bulbs? Mine are a little over 3 months old. _________ 55gal, 65+ lbs LR, 60Lbs LS, Coralife 125 ss, Fluval 305, HydorKoralia 2 + 3, 2 YT Damsels, 2 Misbarred Clownfish, Blue Tang, Yellow Tang, Leopard Wrasse, Asstd snails and hermit crabs, skunk cleaner shrimp, 3 peppermint shrimp, emerald crab, goniopora stokesi, frogspawn, and some other corals.  | 
