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Osram 400W MA lamp Our second MA lamp, completing the set, and it was nice to get the Technical Data on the packaging. Keywords: Lamps

Osram 400W MA lamp


Our second MA lamp, completing the set, and it was nice to get the Technical Data on the packaging.

Westinghouse.jpg MA_lamp.jpg 20190925_192606.jpg Westinghouse_H38-100DX.jpg SHX-S_85.jpg
Lamp/Fixture Information
Manufacturer:Osram
Model Reference:MA/V
Lamp
Lamp Type:Medium Pressure Mercury Vapour
Filament/Radiator Type:Aluminosilicate glass arc tube
Base:E40
Shape/Finish:Tubular
Service Life:14,000 hours
Burning Position:Vertical cap up
Fixture
Ballast Type:Good old magnetic lump
Location:Personal collection
Electrical
Wattage:400W
Voltage:120-150V
Current:3.25A
Optical
Colour Temperature:5400K
Colour Rendering Index:Ra/6
Physical/Production
Dimensions:13 inches long
Factory Location:Shaw, Oldham
Fabrication Date:Date Code 36 (Dec 1952)
File information
Filename:MA_lamp.jpg
Album name:Sammi / Mercury Vapour
Keywords:Lamps
Filesize:387 KiB
Date added:06 Nov 2025
Dimensions:1529 x 2148 pixels
Displayed:582 times
URL:https://trad-lighting.net/gallery/displayimage.php?pid=1030
Favourites:Add to Favourites

Comment 1 to 3 of 3
Page: 1

Max   [Fri 07 Nov 2025 at 19:27]
A good old atmospheric mercury lamp! I wished I had seen those in the wild, it must have been quite a sight, but I was born too late for that. I'd say your lamp is from 1952 given its brass end cap.
Sammi   [Fri 07 Nov 2025 at 23:55]
Thanks Max, I'll amend the info. Love
Max   [Sat 08 Nov 2025 at 14:22]
You're welcome Sammi!

Comment 1 to 3 of 3
Page: 1