Hi,
I guess we have a bit of confusion here. I am using F32T8s..which are 4 feet long and 1 inch in diameter.
There is another tube called F30T12. These are three foot long tubes and 1.5 inches in diameter. The key is T12 vs T8.
T8s are a bit more efficient than T12. Yes, you can overdrive F40T12, but this method may shorten the lifetime of the tube (reduce the life by 20%). So, a tube that has designed to last 10000 hours, would be reduce to 8000 hours or so. These cheaper ballasts use a starting technique called instant start. There are tubes, such as F32T8, that are designed to take the stress of instant start.
I think I stated why I chose T8s over T12 in the previous posts. This overdrive technique can be used with T12.
As Imapler pointed out, you can use a HO ballast to overdrive an NO.
- Victor.
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