Tropical Fish Keeping - Aquarium fish care and resources

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sweet leaf 09-10-2007 02:11 PM

question about flourecent ballast
I want to install two 24" florescent tubes above my tank. I found that when I shop for the ballast they are rated for either a T8 or T12 tube. Is a T12 tube not compatible with a T8 ballast and vice versa? Which is better to go with? I noticed that different manufacturers make their 24" tubes in either T8 or T12 but not both. Also T12's are 20W while most T8's are 17W but I did find a few T8's rated at 20W, what ballast would these use?

mgamer20o0 09-10-2007 03:15 PM

for the most part T8 are more efficient. T12 bulbs are 10w per foot and T8 are 8w per foot but t8 tend to put out more light. i would just go with the t8.

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