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*****NOT MY PICTURE***** The oldest fluorescent tube I have found pictures of on the internet. SELZ F20T12 1957

*****NOT MY PICTURE***** The oldest fluorescent tube I have found pictures of on the internet. SELZ F20T12 1957

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*****This picture was taken from the internet lighting community web page by the name of старый свет or old light. The copyright grounds are fully the creators. By all means, this picture is NOT mine*****

Look at that stem job! Back in these years, fluorescent tubes were molded and cut automatically, but phosphor coating was half automated, the employees had to manually stack the tubes in the machine and then flooded the phosphor on the tubes. Then the stems were made by hand and sealed into the tubes automatically as one employee stacked the tubes and handmade stems onto machine and then gas burners would seal the stems into the tubes. Then the pumping was done manually, for each tube, done by hand and then the endcaps were soldered and glued on by hand. It was the labor of love, these tubes lasted for really, really long time. The filaments had from 10 to 15 coils in the double coiled filament!!!

And when you think about it, the oldest tube I own is SELZ F40T12 LDC made in 1964. Soviets started making tubes already back in 1930s, maybe someday I will find such a tube.. I drool just thinking about it

IMG_20200207_230941.jpg IMG_20200207_225212.jpg dscn3926.jpg IMG_20200206_170038.jpg

Light Information

Light Information

Manufacturer:SELZ
Model Reference:DS-20
Lamp
Lamp Type:Fluorescent
Filament/Radiator Type:Double coiled emitter coated cathode filament
Base:G13 bi-pin
Shape/Finish:Tubular tube
Service Life:approx 30k hours
Electrical
Wattage:20w
Voltage:120V
Optical
Lumen Output:Moderate
Lumen Efficacy:Moderate
Color Temperature:6000k
Color Rendering Index:Not bad but not good
Physical/Production
Factory Location:USSR Smolensk
Fabrication Date:1957
Application/Use:For general lighting

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Date added:Feb 07, 2020
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Silverliner
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Feb 07, 2020 at 04:05 AM Author: Silverliner
Wow nice lamps. The end caps looks much like the early American fluorescent T12 caps made between 1938-1943.

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Feb 07, 2020 at 04:28 AM Author: vytautas_lamps

Wow nice lamps. The end caps looks much like the early American fluorescent T12 caps made between 1938-1943.

Maybe they copied or borrowed the design? Maybe it was the case that they traded the manufacturing process much like when MELZ in Moscow traded Hungary for something I can't remember what exactly, and in return MELZ got American style incandescent lamp manufacturing machines..?

New lighting technologies is a pity fest everywhere you look. From LEDs that last only for two months, to a never-ending global starvation of t8 fluorescent tubes.
We shall reinforce ourselves with good old full mercury t12s and HIDs made to surpass one's life, and give them all the middle finger ;

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Feb 08, 2020 at 04:07 AM Author: Silverliner
GE has a lot of influence over certain Russian lamps. So perhaps that would explain.

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Electrician.

Also a fan of cars, travelling, working out, food, hanging out.

Power company: Southern California Edison.

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Feb 11, 2020 at 03:20 PM Author: Jovan
Nice tube.Hope that you will find such tube one day.
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Feb 11, 2020 at 03:22 PM Author: vytautas_lamps

Nice tube.Hope that you will find such tube one day.

I really hope for it too!

New lighting technologies is a pity fest everywhere you look. From LEDs that last only for two months, to a never-ending global starvation of t8 fluorescent tubes.
We shall reinforce ourselves with good old full mercury t12s and HIDs made to surpass one's life, and give them all the middle finger ;

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Feb 11, 2020 at 03:24 PM Author: Jovan
I think you have tubes from 1947 if I remember correctly ?
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Feb 11, 2020 at 03:27 PM Author: vytautas_lamps

I think you have tubes from 1947 if I remember correctly ?

Cant remember now for sure, will have to look trough my collection.

New lighting technologies is a pity fest everywhere you look. From LEDs that last only for two months, to a never-ending global starvation of t8 fluorescent tubes.
We shall reinforce ourselves with good old full mercury t12s and HIDs made to surpass one's life, and give them all the middle finger ;

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