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General Electric Circle Dot ballast F40T12

General Electric Circle Dot ballast F40T12

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This is a ballast that is in an older light I bought. Does anyone know what the circle dot name means? It appears older as the wires are cloth covered.

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Filename:IMG_1045.JPG
Album name:Bluesvan / Ballasts
Keywords:Gear
File Size:440 KB
Date added:Mar 11, 2019
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Date Time:2019:03:03 17:18:29
DateTime Original:2019:03:03 17:18:29
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fluorescent lover 40
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Lights are awesome! :)


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Mar 11, 2019 at 07:56 PM Author: fluorescent lover 40
What's the date code on the ballast feet? I have no clue what the "Circle Dot" means though.

-Date decoder of most US lamps 1960-present.

-Collects all types of lights.

I'll save any vintage lamp... dead or alive! Smiley

Bluesvan
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Mar 11, 2019 at 09:40 PM Author: Bluesvan
I'll look tomorrow night. The image of the circle dot reminds me of a slimline lamp.
streetlight98
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Mike McCann


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Mar 12, 2019 at 04:34 AM Author: streetlight98
Nice ballast! In good shape too.

To resist is to piss in the wind, anyone who does will end up smelling.

don93s
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Mar 15, 2019 at 07:28 PM Author: don93s
This is a reduced power ballast; Advance had a similar version under the name Ad-Lite. They are similar to the HPF residential ballasts used in shop lights sold by the box stores in the early 90's. Line currents ranged from .60a to .70a. Not sure what the marketing ploy was for these in the 60's though.
DieselNut
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John


jonathon.graves johng917 GeorgiaJohn
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Mar 20, 2019 at 01:13 PM Author: DieselNut
They had circle dot and ad lite ballasts for F40 preheat also. They do not start as well when cold because of their reduced current. I have some super low current Universal rapid start F40 ballasts too. They really suck in the cold. Interesting because they were made in the 1960s, long before the "energy saver" type tubes came out.

Preheat Fluorescents forever!
I love diesel engines, rural/farm life and vintage lighting!

streetlight98
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Mike McCann


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Mar 20, 2019 at 03:58 PM Author: streetlight98
John, do those early reduced current ballasts run ok with energy saving lamps or do they still overheat like other ballasts of the era?

To resist is to piss in the wind, anyone who does will end up smelling.

DieselNut
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John


jonathon.graves johng917 GeorgiaJohn
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Mar 20, 2019 at 04:59 PM Author: DieselNut
I have never tried it personally because I have very few 34 watt tubes. It would be an interesting experiment since I have some of the old Universal that are .6ish amps.

Preheat Fluorescents forever!
I love diesel engines, rural/farm life and vintage lighting!

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