Author Topic: Date codes for Sylvania tubes  (Read 268 times)
108CAM
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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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