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MB/U 250W Mercury Vapour

MB/U 250W Mercury Vapour

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These 2 mercury vapour lamps have "frosted" arc tubes. The upper most lamp is badged "Altas" and I think is from 1975 but maybe earlier. The lower lamp is badged Thorn and looks like manufactured in 1984. I don't think Thorn had this lamp in their catalogue by the 1980s so don't know if it is badged Thorn and manufactured by someone else. There are certainly signs the Thorn lamp was cheaper to make, other than a very uniform frosting on the Thorn arc tube the Atlas lamp looks better made.

mb_u250w.jpg XBO3.jpg mh1kw.jpg 1kw_MH.jpg

Light Information

Light Information

Manufacturer:Thorn
Model Reference:MB/U
Lamp
Lamp Type:Mercury Vapour
Electrical
Wattage:250

File information

File information

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Filename:mb_u250w.jpg
Album name:tuopeek / High Pressure Lamps
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File Size:146 KB
Date added:Jan 08, 2018
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Date Time:2018:01:07 20:05:03
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merc
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Adam


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Jan 08, 2018 at 03:41 PM Author: merc
Beautiful lamps!

Not a misoLEDist...

sailormoon_01_uk
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Jan 08, 2018 at 05:34 PM Author: sailormoon_01_uk
The Atlas MB/U Lamp has date code 14 which = to February 1967,

The Thorn Lamp looks like it's Philips Made as it has the same supports as the early HPI-T Lamps, anyway can you give the 2 digit number on the Thorn Lamp and I can date it for you, It's normally the two numbers between MADE IN (--) GT BRITAIN.
MissRiaElaine
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Mainly the electrical side of things


ATL missriaelaine
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Jan 08, 2018 at 06:45 PM Author: MissRiaElaine
They're certainly lovely lamps, I have the GEC one which is really good to see lit up

Ria in Aberdeen

I don't disapprove of LED's for domestic and other indoor use, I just don't like them for street lighting.

tuopeek
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GLS on Tesla Coil


tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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Jan 09, 2018 at 11:35 AM Author: tuopeek
The date code on the Thorn lamp I think is 30. I bought it new in the mid 80s so 1984 looks possible but I have a Thorn 1978 lighting catalogue and it doesn't mention MB/U lamps but I guess it could be a 1976 date code. Interesting the Atlas is older than I thought but that would fit as the Atlas logo kind of dwindled in the 70s being replaced by Thorn logos.
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Jan 09, 2018 at 11:41 AM Author: Danny
Love these lamps with the frosted Arc tube. I have one knocking about somewhere . This has tempted me to dig it out and light it
sailormoon_01_uk
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Jan 09, 2018 at 12:52 PM Author: sailormoon_01_uk
your Thorn MB/U with 30 on it = June 1984, as the 1976 MB/U is the same as the Atlas and Mazda MB/U lamps in Construction, it could be for Special Order as although MB/U lamps are No longer made, they are still available for the Military, NATO stock No 6240-99-996-6758 or 6240-99-996-6762 (250w MB/U) and NATO Stock No 6240-99-996-6771 (400w MB/U), but are now made by Iwasaki Lighting ref No HT250 and HT400 see the bottom of the page https://www.eye.co.jp/documents/en/lighting/sources/mercury/p50.pdf.
tuopeek
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tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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Jan 09, 2018 at 01:07 PM Author: tuopeek
Interesting
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