02-11-2008, 05:27 AM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 3,545
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T-8 and T-12 refers to the physical size of the tubes the HO is high output and requires a ballast of the same HO output. The T-5/HO will probably not "fire" with a standard ballast.
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