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Westinghouse Ceramalux/4, C150S56/DX4 Deluxe High Pressure Sodium Lamp Imagine my surprise when I came across this rare DX HPS on eBay... Keywords: Lamps

Westinghouse Ceramalux/4, C150S56/DX4 Deluxe High Pressure Sodium Lamp

Imagine my surprise when I came across this rare DX HPS on eBay...

WC-C250S50-99-1_0.jpg WC-C400S51-1_2.jpg WC-C250S50-DX4-72-1.jpg WC-C150S56-DX4-1.jpg GE-LU400-DX-28-1.jpg
Lamp/Fixture Information
Manufacturer:Westinghouse Electric Corporation
Model Reference:C150S56/DX4
Lamp
Lamp Type:High Pressure Sodium
Filament/Radiator Type:PCA (Poly Crystal Alumina)
Base:E39 (Mogul)
Shape/Finish:BT28
Service Life:7,500 Hrs
Burning Position:Universal
Fixture
Ballast Type:S56
Electrical
Wattage:150W ~
Voltage:100V ~
Current:1.82A ~
Optical
Lumen Output:13,600 (Initial), 12,240 (Average)
Lumen Efficacy:91/82 LPW
Colour Temperature:2200K CCT ~
Colour Rendering Index:65% ~
Physical/Production
Factory Location:Bath, NY USA
Fabrication Date:01/82
File information
Filename:WC-C150S56-DX4-1.jpg
Album name:Eric / High Pressure Sodium Lamps
Keywords:Lamps
Filesize:446 KiB
Date added:10 Mar 2026
Dimensions:2048 x 1188 pixels
Displayed:28 times
URL:https://trad-lighting.net/gallery/displayimage.php?pid=1129
Favourites:Add to Favourites

Comment 1 to 3 of 3
Page: 1

Ria   [Tue 10 Mar 2026 at 14:27]
Very nice, got to love BT lamps HPS bulb HD
Max   [Tue 10 Mar 2026 at 21:04]
Nice seeing the smaller variant of the original Ceramalux 4. That one is certainly not common. Have you lit it already? Is its light color perceptibly better than that of a standard HPS lamp?
BT25   [Sun 22 Mar 2026 at 21:24]
For a long time, I didn't have a luminaire to run this in being that S56 HPS is rather rare...I have one now, but I'm hesitant to run it being that this lamp is about as common as hens teeth.
From the DX HPS lamps I have run, they appear slightly whiter...the big difference is the perception of color.

Comment 1 to 3 of 3
Page: 1