The Planted Tank Forum - View Single Post - T12/T8 interchangable
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post #4 of (permalink) Old 01-20-2013, 03:04 AM
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Join Date: Dec 2005
Location: Sacramento, CA
Posts: 19,681
The original T8 bulbs were substituted directly for T12 bulbs, for power savings. I used to use a DIY light with T8 bulbs and a magnetic ballast, and it worked fine, except when the temperature dropped below about 65F, as I recall, then the bulbs wouldn't light. At normal 70F+ room temperature, it worked fine, discounting the flicker and hum.

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