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Thorn 400w Kolorarc MBIF/H

Thorn 400w Kolorarc MBIF/H

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Nice early NOS Thorn fluorescent coated metal halide lamp.
Date code looks like 71.

Proper halide lamps there!

IMG_6518.JPG DPP00003472.JPG DPP00003382.JPG DPP00003378.JPG

Light Information

Light Information

Manufacturer:Thorn
Model Reference:Kolorarc MBIF/H
Lamp
Lamp Type:MBIF
Base:E40
Service Life:15,000h
Electrical
Wattage:400w
Voltage:120v
Current:3.4a
Optical
Lumen Output:38,000lm
Color Temperature:4000k
Physical/Production
Factory Location:England
Fabrication Date:Date code 71

File information

File information

Download: Download this File
Filename:DPP00003382.JPG
Album name:FrontSideBus / HID: Metal halide
Keywords:Lamps
File Size:1866 KB
Date added:May 25, 2016
Dimensions:1920 x 1280 pixels
Displayed:105 times
Date Time:2016:05:25 11:29:43
DateTime Original:2016:05:25 07:12:11
Exposure Bias:1 EV
Exposure Time:1/1 sec
FNumber:f 16
Flash:No Flash
Focal length:52 mm
ISO:100
Make:Canon
Model:Canon EOS 70D
Software:Digital Photo Professional
White Balance:0
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-120830
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Comments
Globe Collector
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May 25, 2016 at 06:43 AM Author: Globe Collector
Pity it ain't one of those special "Marks and Spencer" ones! I have two of these, both used bit operable, they look Identical. I think this is tri-salt if I recall correctly.

Manufactured articles should be made to be used, not made to be sold!

Fee, Fye, Fow, Fum, A dead man's eye and a parrot's BUM!

FrontSideBus
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May 25, 2016 at 10:26 AM Author: FrontSideBus
These sodium-scandium lamps were developed together with Sylvania in the US IIRC, and while they had outstanding colour stability throughout their lives and a high intitial luminous flux, they suffered from quite a large lumen depreciation early on which made them less efficient towards the end compared with its rivals.

UK out of the EU!
http://www.lighting-gallery.net/gallery/index.php?cat=11271

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May 25, 2016 at 05:30 PM Author: sailormoon_01_uk
Hi Mark,

A fellow Enginneer/Collector used to use these in the Dedicated Integral Geared Thorn Alpha 3 Street Lights in Derby City Centre, anyway the Date Code 71 = November 1979. I too have some of these in Base Up to Horizontal and Horizontal, I also have 2 x 400 watt and 2 x 1000 watt Clear versions Base Down Only for use in Lighthouses.
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May 25, 2016 at 06:46 PM Author: Globe Collector
I really don't know what made me sat "Tri-Salt".....maybe I was thinking of the Philips HPI-BUS lamp....because when I got these, I did fire them up and check the spectrum, I now recall I was surprised to see a scandium spectrum, one of the few non-American lamps made at that time to exhibit it. Actually it was one of only a few British Metal Halides full stop!

Colin. have you posted pictures of your two clear versions already?


Oh, one more thing...does anybody know what the "B" signifies.....mine both have a lone capital letter too, but I recall it was an "R", I may be wrong though.

Manufactured articles should be made to be used, not made to be sold!

Fee, Fye, Fow, Fum, A dead man's eye and a parrot's BUM!

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May 25, 2016 at 06:54 PM Author: FrontSideBus
What would the date of that 250w that I uploaded be with a code of 70?

UK out of the EU!
http://www.lighting-gallery.net/gallery/index.php?cat=11271

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May 25, 2016 at 07:15 PM Author: Globe Collector
"70" = October 1979,1987, 1995 Etc.

Manufactured articles should be made to be used, not made to be sold!

Fee, Fye, Fow, Fum, A dead man's eye and a parrot's BUM!

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May 25, 2016 at 10:11 PM Author: sailormoon_01_uk
Yep the 250 watt lamp is dated October 1979 if 1987 it would be in a blue sleeve with Thorn EMI if 1995 it would be in a purple sleeve and would be a GE lamp.
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May 26, 2016 at 04:48 AM Author: FrontSideBus
Cheers.

UK out of the EU!
http://www.lighting-gallery.net/gallery/index.php?cat=11271

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May 26, 2016 at 07:09 AM Author: sailormoon_01_uk
H Mark, No Problems glad to help Identify your Lamps

Hi Globecollector to see my Clear Metal Halides can be seen HERE for the Thorn 1000w MBI/BD, see HERE for the Thorn 400w MBI/BD see HERE[/url for New Old Stock Thorn 400w MBI/BD Lamp and see [url=http://www.lighting-gallery.net/gallery/displayimage.php?pos=-117972]HERE for a Used Thorn 1000w MBI/BD lighthouse Lamp.
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