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Osram GEC 40 watt MBM/U Mercury Lamp for Coal Mining Applications

Osram GEC 40 watt MBM/U Mercury Lamp for Coal Mining Applications

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This Osram GEC 40 watt MBM/U Mercury Lamp was designed for lighting in coal mines there have always been very strict regulations on the use of electricity. The tiny spark occurring when a switch is opened or if there is poor contact at lamp terminals can easily trigger an explosion.

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Light Information

Light Information

Manufacturer:Osram-GEC
Model Reference:MBM/U
Lamp
Lamp Type:Mercury Vapour Lamp
Filament/Radiator Type:Quartz Arc Tube
Base:P28s or MPF (Medium Pre-Focus)
Shape/Finish:S
Service Life:3000 Hours
Fixture
Fixture Type:Special Flameproof Fittings
Ballast Type:Special Ballast (Air Compresser Driven Generator/Ballast within Fittings)
Location:Personel Collection
Electrical
Wattage:40 watts
Voltage:80-105 volts
Current:0.45 to 0.6 amps
Optical
Lumen Output:1000 Lumens
Color Temperature:6700 deg K
Color Rendering Index:CRI-16
Physical/Production
Dimensions:138mm x 54mm
Factory Location:England
Fabrication Date:1940's
Application/Use:Mine Lighting

File information

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Filename:Osram-40w-MBM-Mercury-Lamp.jpg
Album name:sailormoon_01_uk / Specialised Lamps
Keywords:Lamps
File Size:36 KB
Date added:Jul 29, 2013
Dimensions:700 x 525 pixels
Displayed:136 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-83181
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Comments
rjluna2
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Robert


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Jul 29, 2013 at 10:11 AM Author: rjluna2
I have seen this at James Hooker's web site

Pretty, please no more Chinese failure.

sailormoon_01_uk
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Area of interest: Airport and Discharge Lighting,


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Jul 29, 2013 at 10:30 AM Author: sailormoon_01_uk
Yep, he has the 3-pin BC version by B.T.H Mazda,
Globe Collector
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Preserving the Brightest Ideas of Our Age


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Nov 01, 2016 at 12:43 AM Author: Globe Collector
Somebody has filed the pins off the base and soldered a P28s cap over the top....probably in some physics lab at some Uni, seen quite a few rare lamps "defaced" this way. I have a similarly butchered HPK.

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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