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Sylvania F40/CW Comparison

Sylvania F40/CW Comparison

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Through the years I've noticed some peculiar batches of 40w cool white Sylvania from the 80's. Aside from changing the end-cap style and using the GTE logo, there were other subtle differences.

Some had longer electrode leads than others, as shown above (black marker used) and the phosphor is grainy. On these lamps, they also have the 'V' stamp (Versailles factory) on the other end.

Maybe some of you guys know a bit about this, but I've seen the Versailles stamp on the smaller lamps as well as non-cool white (like /WW) 40w lamps. But, during the 80's , they were also /CW as well. Any back story on this?

018_1~4.JPG 020_1~5.JPG sylvania1.jpg Last_PH.jpg

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Album name:don93s / Various Lights
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Date added:Mar 15, 2019
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ace100w120v
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Mar 16, 2019 at 12:22 AM Author: ace100w120v
Not real familiar with Sylvania, but I've noted that on many GE lamps the etch distance from the endocap varied. At some point the electrodes were re-designed to be longer ('90s-'00s lamps) as opposed to say the "Mainlighter" lamps of the 60s/70s/80s.
don93s
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Mar 16, 2019 at 10:37 AM Author: don93s
Yeah, the GE lamps transitioned during the 80's. Some factories went to longer electrodes before others, just as some changed the etch before others. I've even seen lamps with the old style electrode on one end with the newer style on the other!
ace100w120v
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Mar 16, 2019 at 03:28 PM Author: ace100w120v
Those must be an interesting anomaly!
Cool white 79
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Apr 13, 2019 at 06:58 AM Author: Cool white 79
I really like the bottom tube. I remember seeing both types of these lamps in school (along with GE and Westinghouse) back in the late 80s through the mid 90s. I still don't understand why Sylvania put the #s over the etch. They seemed to do it starting in the early 90s, 90, 91 IIRC.
ace100w120v
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Apr 13, 2019 at 12:16 PM Author: ace100w120v
I've always wondered such too. I had some F96T12/CW/SS from '96 like that.
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