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Soviet Used F40T12 LDC Fluorescent tube, made by Razno under PZGRL

Soviet Used F40T12 LDC Fluorescent tube, made by Razno under PZGRL

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This is the rare version of Razno tubes, that used the fully developed "RAZNO" etch. You see, Razno etch was always meant to look like symbol of a ballast. Most of the time the etch was written on the tube as a half effort because of its complexity, but this is the real deal. This tube was made in Ukraine, by PZGRL. You can tell by the factory identification number on top of the "Razno". This is a LDC tube, witch mean 5500k color temperature. The phosphor is horrible in this tube, the tube is dim and it has the very noticeable flicker, even in real life it flickers at an annoying rate. It has very horrible bluish light to it, and I can't bear looking at it. Basically saying the tube is horrific quality, but what could you want from a tube that was made by PZGRL. But nice addition to my collection. I have never seen a tube with original Razno logo on it. It's a keeper. It is well used but still has a moderate life left to it. Also it has a nice death window on the side, you can easily see the discharge.

IMG_20200519_192901_1.jpg youtube_Z9fwTrgDGps.jpg solariumu-lempos.jpg IMG_20200405_235134.jpg

Light Information

Light Information

Manufacturer:PZGRL (Ukraines Poltava gas discharge lamp manufacturing plant) Branded for export "Razno"
Model Reference:LDC 40
Lamp
Lamp Type:Fluorescent
Filament/Radiator Type:Double coiled emitter coated cathode filament
Base:G13 bi-pin
Shape/Finish:Tubular tube
Service Life:approx 20k hours
Electrical
Wattage:40w
Voltage:200v
Optical
Lumen Output:Low
Lumen Efficacy:Low
Color Temperature:5000k
Color Rendering Index:Pretty bad
Physical/Production
Factory Location:Ukraine, Poltava
Fabrication Date:1980 - 1990s
Application/Use:For general lighting

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Album name:vytautas_lamps / fluorescent tubes T8/T12
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Date added:May 19, 2020
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Jovan
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May 19, 2020 at 03:31 PM Author: Jovan
I think that CRI on ЛДЦ(LDC) lamps is about 80.I have another etch Razno tube with ЛБ(LB) color.Coating on soviet tubes is granular and looks like contaminated.For table of Yugoslav colors I will try to post it for few days due to low or no literature.Fun fact:Yugoslav Tesla made FT in colours(Green,Red and Blue) and Germicidal tubes.UV blacklight tubes weren't made,UHP xenon cinema lamps weren't made.
rjluna2
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Robert


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May 19, 2020 at 06:28 PM Author: rjluna2
I must remember that Ukraine is under Soviet banner when the was made

Pretty, please no more Chinese failure.

TL buis
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May 24, 2020 at 01:44 AM Author: TL buis
Unless all these haves normally very nice end banding and this one looks like nearly EOL as seen on filament glow in operation and big blackending spot. so haves done it's best?? Probably alot of mercury inside??
vytautas_lamps
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My idol is Mylene Farmer, deal with it.


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May 26, 2020 at 04:53 AM Author: vytautas_lamps

Unless all these haves normally very nice end banding and this one looks like nearly EOL as seen on filament glow in operation and big blackending spot. so haves done it's best?? Probably alot of mercury inside??

These lamps were not very good quality, because they were made in Ukraine by PZGRL factory. Even tho these have double coiled filament, they are not very good. They have a lot of mercury, but filling is not the right pressure, not the right proportions, etc. So it flickers quiet badly, gets very hot, and ard not very bright cause of tge bad phosphor.. But nevertgeless nice aditions to 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 ;

don93s
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May 26, 2020 at 11:15 AM Author: don93s
Very interesting! I've seen plenty of 'higher quality' vintage lamps also make those cathode 'viewing windows' which is always cool!
xmaslightguy
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zzz


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May 26, 2020 at 01:03 PM Author: xmaslightguy
Yep.. always cool when a lamp develops one of those viewing windows

Its All For The Christmas Lights...
And A Good Summer Thunderstorm!

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