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Radiant H37-5KB 250w clear merc

Radiant H37-5KB 250w clear merc

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Here's a beautiful NOS Radiant clear mercury lamp.

2011-06-12_00-18-16_654.jpg 2011-06-01_21-24-10_559.jpg 2011-05-18_00-21-27_483.jpg 2011-05-18_12-05-10_892.jpg

Light Information

Light Information

Manufacturer:Radiant Lamp Co
Model Reference:H37-5KB
Lamp
Lamp Type:Mercury Vapor
Base:Mogul Screw E39s
Shape/Finish:BT28
Service Life:24000 hours
Electrical
Wattage:250w
Optical
Lumen Output:11000 hours
Color Temperature:5700K
Color Rendering Index:20
Physical/Production
Factory Location:Highstown NJ USA
Fabrication Date:April 1969

File information

File information

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Filename:2011-05-18_00-21-27_483.jpg
Album name:silverliner / good ol' mercury vapor
Keywords:Lamps
File Size:378 KB
Date added:May 18, 2011
Dimensions:2048 x 1529 pixels
Displayed:323 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-54824
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icefoglights
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ITT Low Pressure Sodium NEMA


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May 18, 2011 at 08:43 PM Author: icefoglights
Nice find! Just look how well made it is

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arcblue
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May 18, 2011 at 10:05 PM Author: arcblue
I like Sylvania's massive RS frame better, but this is a beautiful lamp!

I'm lampin...

jercar954
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May 19, 2011 at 08:24 AM Author: jercar954
Wow, what a find! This lamp exemplifies the fact that MV's can last 40 years or more.

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

LandryB
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May 10, 2013 at 06:53 PM Author: LandryB
Were these made by Westinghouse?
jercar954
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May 10, 2013 at 07:00 PM Author: jercar954
They were made by Philips until the brand was sold to fake Westinghouse a few years ago.

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

don93s
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Jul 17, 2014 at 07:49 AM Author: don93s
Resembles a Sylvania made arc tube.
sol
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Jul 17, 2014 at 08:18 AM Author: sol
What does the 5KB in the H37-5KB mean ? I have some 175 watt lamps that are H39-KC and always wondered what the second part of the code stands for.
Foxtronix
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Formerly "TiCoune66". Also known here as Vince.


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Jul 17, 2014 at 10:10 AM Author: Foxtronix
(H)5 was the former ANSI designation for 250W mercury. For a while ordering codes featured both numbers, but before being H37 they were known as H5.

KB identifies a clear BT-28 or ED-28 outer bulb.

sol
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Jul 17, 2014 at 07:16 PM Author: sol
Oh, I see. Do the letters mean something or are they random ?
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Formerly "TiCoune66". Also known here as Vince.


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Jul 17, 2014 at 07:29 PM Author: Foxtronix
They seem to be more or less random, although various bulb finishes will often share the same first letter. Say the BT-56 bulb, GW is for the phosphored version and GV for the clear version, and the half-coated version is the black sheep with KY. Go take a look in a large lamp catalog from the 70s and you'll have most of them.

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Jul 17, 2014 at 07:49 PM Author: funkybulb
Vere cool id like the ruggedness of that frame
And this can see dacades of use out of this

No LED gadgets, spins too slowly.  Gotta  love preheat and MV. let the lights keep my meter spinning.

Silverliner
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Verd a ray classic.


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Jul 17, 2014 at 07:54 PM Author: Silverliner
The letter codes like KB, KC, JA, HT etc are assigned by the ANSI to identify the type of lamp based on finish, shape, application etc.

May all the great lighting technologies have their place in history.

Administrator of Lighting-Gallery.net. Need help? PM me.

don93s
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Jul 17, 2014 at 09:01 PM Author: don93s
I do remember seeing KB on the clear ones while KC on the coated Westinghouse 175w.
sol
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Jul 18, 2014 at 10:18 AM Author: sol
Thanks for your explanations, I will try to find old catalogues.
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Jul 24, 2015 at 08:03 PM Author: ricksbulbs
I have 2 even older Radiant 250's. One is a clear the other a /C and they have inside etches and 3 piece arc tubes with narrow pinch seals. (dimpled ones at that!) I have used both some, and after some use neither shows ANY discoloration of the arc tube! The operating electrodes are HUGE--like the size of a 400 watt lamp in a 250! The /C was given to me by a friend in school back in 1978, in 6th grade, and the clear I got in the mid 1980's at a garage sale for WAY too much money for this crappy old bulb--I paid 10 cents for a 2 cent bulb! I got screwed hard! NOT! The clear shows the beautiful construction, and with those electrodes I can forsee this thing making a Westinghouse Lifeguard look like a cheezy Chinese lamp performance wise! I used the clear for a year in my back yard in my 250 watt ITT model 113, and it never discolored a bit! The /C was used at least a whole winter in a Crouse-Hinds 250 merc "Relamp Champ 2" vaportight fixture and also didn't discolor a bit---in fact both still look unused! The arc tubes are really "fat", too, and with the narrow pinch seals that makes them look even more so! I also have a full case or 2 of later Radiant 250 /C lamps, built like this one. Dave D has one I think, that I sent him. They have the later corrugated wrappers. I never had any wrappers for my old narrow pinch seal lamps though. The /C of this pair has a beautiful. very warm very yellow light! Just gorgeous! Cheers! Rick "C-6" Delair--I hope to eventually post pics of these lamps!
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