On Sat, 10 Feb 2018 13:16:54 +0000, Dave Plowman (News) wrote:

Have a pretty old twin 6 ft fitting (ballast and starter) where an
original T12 tubes has failed. Replaced it with a T8 - which is very
noticeably dimmer than the other old T12. Swapping them makes no
difference, so not the control gear?

Blurb says they are more efficient than T12. Does that also mean less
light?

Thought you of all people would have converted to LEDs by now, Dave!



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