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G.E.C. HPS/U 400 Made at Duke Mill, Shaw, January 1976

G.E.C. HPS/U 400 Made at Duke Mill, Shaw, January 1976

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Fairly rare G.E.C. HPS/U 400 High Pressure Sodium Lamp. These were made in 250, 310, 360, 400, 600 and 1000w Ratings. At and below 400w thwy were also made with diffusing E bulbs and the 250W rating was available in an R bulb. All had very unique arc tube seals where niobium plates overhung the ends of the arc tube in a cone. This was totally unique to the Mid 70's G.E.C. HPS/U series lamps. Later they became SON/T series, the seal was changed to a more conventional form and the bases were conform fitted (i.e screwed over a molded thread in the bulb and locked with a blob of lead in a dimple). These earlier versions had the base with the thread free area at the top and were glued on with the heat cured composite binder-filler cement.

SONDL-TRunUp2.jpg 89-0733Jr.jpg 89-0733Ar.jpg 89-0733Z7.jpg

Light Information

Light Information

Manufacturer:Brand, G.E.C., Manufacturer, Dike Mill, Shaw, Manchester, Company, The General Electric Co. of England
Model Reference:HPS/U 400 Later changed to SON/T 400
Lamp
Lamp Type:High Pressure Sodium
Filament/Radiator Type:Not Applicable (ANhA Arc Tube)
Base:E40/47 Nickel Plated Brass fastened with heat-cured cement
Shape/Finish:T-50
Service Life:>10,000h
Fixture
Ballast Type:120mH Choke in series off 240v R.M.S. at 50Hz
Electrical
Wattage:400
Voltage:c100v arc drop at full power
Current:c4A
Optical
Lumen Output:48000 at 100h, 45000 at 2000h
Lumen Efficacy:115 lm/W
Color Temperature:2100K
Color Rendering Index:25
Physical/Production
Dimensions:50mm dia., 279mm long.
Factory Location:Duke Mill, Shaw, Manchester. (53* 34' 29.0" N, 02* 35' 34.0"W)
Fabrication Date:January 1976 (Date Code HA)
Application/Use:Street and area lighting

File information

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Filename:89-0733Ar.jpg
Album name:Globe Collector / High Pressure Discharge Lamps
Keywords:Lamps
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Date added:Jul 02, 2014
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tuopeek
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tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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Jul 02, 2014 at 12:20 PM Author: tuopeek
I have one of these and I am always impressed how it will start with the internal snap starter without an external ignitor.
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Jul 20, 2014 at 12:50 AM Author: James
Superb lamp Andrew, a real piece of HPS history here! GEC made the first HPS lamps in Europe and there are quite a number of early design features here which later fell out of fashion, in particular the unique reactive metal brazed end seals which I will comment on under your detail photo of that.
Globe Collector
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Jul 20, 2014 at 06:13 PM Author: Globe Collector
Yes, James, I got these back in the 1970's when they were still relatively "common". I have the 600 and 1000w versions too. G.E.C. was one of the prominent H.I.D. lamp suppliers in Tasmania in the 1970's, (The others being Philips and G.E., Sylvania did not come until later).
I think I have a SON-E 210 or 350 with this same end seal design too.

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!

Kev
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Jul 21, 2014 at 12:19 AM Author: Kev
Proper quality lamp here! Good save.

Voted to leave the EU and proud! 👉🏻🇪🇺🇬🇧

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Dec 14, 2015 at 09:28 PM Author: Globe Collector
See James' earlier 310w flat end plate model

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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