Reply by tefinn

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Posted on Lighting: Help me understand the difference between T8 and T12

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1222 posts in 3499 days

#1 posted 01-12-2014 05:10 PM

Hey Lee, there’s not a lot really to say about them. The T8’s use less electricity than T12’s and put out brighter light. The T12’s are no longer made in the US, so the cost of the T8 fixtures has dropped and is now comparable to what the T12’s were. They install exactly the same as T12’s. If you have T12 fixtures, you can even convert them to T8 (the pins and length for both types are the same) by changing the ballast and installing new T8 tubes. The ballasts cost the about the same as the old T12’s did. I bought mine at HD for about $15 each.

As far as operating cost, they do save money on the electric bill. I grow tropical plants/orchids (my other hobby) under lights and have six, three shelf stands with a two light fixture on each shelf. That’s 24 light fixtures with 48 bulbs that run for 12hrs a day. After converting them all from T12 to T8 my electric bill dropped over $40 a month.

-- Tom Finnigan - Measures? We don't need no stinking measures! - Hmm, maybe thats why my project pieces don't fit.

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