Date codes for Sylvania tubes « on: June 24, 2022, 12:09:45 AM » Author: 108CAM
I need help with the date codes on some of my tubes. I know the Lifelines are December 1979 However I can't figure out if these F20T12 warm whites are from 1965 or 1975 And this tube comes in as 1954 Anyone able to help me? I can get the month on all 3 but the year is a bit more difficult
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