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Siemens-Ediswan 'Sieray' 240V 500W MAT/V Lamp Here is a lamp I never thought I would find. It's a Siemens-Ediswan 'Sieray' 240V 500W MAT/V lamp and it looks almost new, although I know it has been lit once or twice. We'll be lighting it for some photos and then mounting it in a display case, so photos of that to follow. Many thanks to Andy (Photonicinduction) for this lamp, and also to Max for decoding the date code for us. Keywords: Lamps

Siemens-Ediswan 'Sieray' 240V 500W MAT/V Lamp


Here is a lamp I never thought I would find. It's a Siemens-Ediswan 'Sieray' 240V 500W MAT/V lamp and it looks almost new, although I know it has been lit once or twice. We'll be lighting it for some photos and then mounting it in a display case, so photos of that to follow.

Many thanks to Andy (Photonicinduction) for this lamp, and also to Max for decoding the date code for us.

Mazda_250W_ME-D_Lamp.jpg Siemens-Ediswan_240V_500W_MAT-V_Lamp_Lit.jpg Siemens-Ediswan_240V_500W_MAT-V_Lamp.jpg Osram_80W_MBW-U.jpg Siemens_MB-V_87.jpg
Lamp/Fixture Information
Manufacturer:Siemens-Ediswan
Model Reference:MAT/V
Lamp
Lamp Type:Self Ballasted Medium Pressure Mercury Vapour
Filament/Radiator Type:Tungsten filament / Medium Pressure Mercury Arc Tube
Base:GES (E40)
Service Life:2000 hours
Burning Position:Vertical, cap up
Electrical
Wattage:500
Voltage:240
Physical/Production
Factory Location:Strand Road, Preston
Fabrication Date:November 1957 (date code 95)
File information
Filename:Siemens-Ediswan_240V_500W_MAT-V_Lamp.jpg
Album name:Ria / Mercury Lamps
Keywords:Lamps
Filesize:217 KiB
Date added:10 May 2025
Dimensions:1467 x 1506 pixels
Displayed:12 times
URL:https://trad-lighting.net/gallery/displayimage.php?pid=837
Favourites:Add to Favourites

Comment 1 to 4 of 4
Page: 1

Sammi   [Sat 10 May 2025 at 20:55]
What a wonderful lamp to have in our collection, worth every penny that we spent on it. Love Bulb Man
Max   [Sat 10 May 2025 at 21:57]
Quite the museum piece here, especially in such a clean state of preservation! Congratulation on your last addition! As for the manufacturing date, I'd say November 1957 due to the Siemens-Ediswan brand, which could not have existed before AEI acquired Siemens Bros in 1957 (the Edison & Swan United Electric Light Company was acquired by AEI in 1929). The Ediswan brand was eventually dropped at the end of the 1950s, so it cannot be 1965, the next iteration in the British ELMA code system.
Ria   [Sat 10 May 2025 at 22:11]
Yes, it's practically NOS. Sadly we don't have the wrapper, but that's the case for a lot of lamps these days Sad bulb icon
Thanks for the date code translation, much appreciated Love
Ria   [Sat 31 May 2025 at 21:08]
We now have this wonderful lamp mounted in a display case, see here Mercury Vapour Lamp Bulb Man

Comment 1 to 4 of 4
Page: 1