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General Electric F40 White

General Electric F40 White

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This looks VERY old!!!

13w_Dulux_off.jpg 13w_Dulux_messed_up.jpg GE_F40_White.jpg 2_old_GE_lamps.jpg

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Filename:GE_F40_White.jpg
Album name:j-frog / Fluorescent
Keywords:Lamps
File Size:71 KB
Date added:Jan 18, 2007
Dimensions:1024 x 768 pixels
Displayed:131 times
Date Time:2007:01:18 20:58:36
DateTime Original:2007:01:18 20:58:36
Exposure Bias:0 EV
Exposure Time:1/60 sec
FNumber:f 2.7
Flash:Unknown: 80
Focal length:6 mm
Make:Canon
Model:Canon PowerShot S3 IS
White Balance:0
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-11220
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Jan 18, 2007 at 09:50 PM Author:
WHAT IS THAT I have never seen an endcap like THAT before someone should know tho
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Jan 18, 2007 at 10:17 PM Author: don93s
You could use a small magnet to see if it is made of steel. Could be some sort of coating...zinc or whatever to make that color.
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Jan 18, 2007 at 10:53 PM Author: jercar954
This is a brass end cap lamp from the 4th quarter of 1945. Badly tarnished but easily polished to a high shine with some Brasso. Warning: This lamp has zinc beryllium phosphors. Handle with care! Also, it's cathodes are designed for use in preheat fixtures, it will not last long in a rapid start fixture.

Very very nice find!!!!!

Preheat and T-12 fluorescents forever! Down with LED's and instant start T-8 fluorescents.





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Jan 18, 2007 at 10:54 PM Author:
I also got a F20 one from the same place with Jeremiah where we went near my house!!!! mine is from 1946 according to Dave........mine is also brass with reddish color plastic which may be bakelite!
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Jan 18, 2007 at 10:57 PM Author: J-Frog
So far I've only used it on a preheat ballast as Dave told me to and I know about the beryllium, nasty stuff!!!

Jeremiah The Bullfrog

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Rare white reflector


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Jan 19, 2007 at 04:19 PM Author: Silverliner
Jerry and everyone, the end caps on this lamp are brass plated steel. The pre-war end caps are pure brass, then the war led to a brass shortage so most end caps were made of steel. Some end caps were made of brass after the war, others were made of brass plated steel such as the GE T-12 rounded end caps. In 1949 GE came out with the current aluminum T-12 end caps.

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Jan 19, 2007 at 04:51 PM Author: jercar954
Dave, thanks for the info. I'll have to check my 1945 GE 4500 with a magnet to see if it's plated or solid. It's either one or the other.

Preheat and T-12 fluorescents forever! Down with LED's and instant start T-8 fluorescents.

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