Photo Gallery

Home > User galleries > Cobrahead > High Pressure Sodium Lamps
Return to the thumbnail page FILE 2/3 Return to start See previous file See next file Skip to end
Westinghouse Ceramalux/4, C250S50/DX4 250W Deluxe High Pressure Sodium Lamp There’s virtually no data available for this lamp, but what follows is what little is available: Around 1978, Westinghouse created and brought this lamp to market. (General Electric followed suit about two years later with their own version.) This lamp was the first US deluxe high pressure sodium lamp. It appears that it was discontinued sometime after the Philips take over in 1983. It also appears that this lamp was not a great seller. (Philips around 1988 reintroduced the DX lamp and called it by the “Comfort” branding.) Originally only sold in the 250-watt size, a 150-watt (100V/S56), and the 200-watt (S66) sizes were added later. Suggested retail price in 1980 is $71.00! Keywords: Lamps

Westinghouse Ceramalux/4, C250S50/DX4 250W Deluxe High Pressure Sodium Lamp

There’s virtually no data available for this lamp, but what follows is what little is available: Around 1978, Westinghouse created and brought this lamp to market. (General Electric followed suit about two years later with their own version.) This lamp was the first US deluxe high pressure sodium lamp. It appears that it was discontinued sometime after the Philips take over in 1983. It also appears that this lamp was not a great seller. (Philips around 1988 reintroduced the DX lamp and called it by the “Comfort” branding.) Originally only sold in the 250-watt size, a 150-watt (100V/S56), and the 200-watt (S66) sizes were added later.

Suggested retail price in 1980 is $71.00!

WC-C150S56-DX4-1.jpg WC-C250S50-DX4-72-1.jpg WC-C70S62PAR-X9-1_1.jpg
Lamp/Fixture Information
Manufacturer:Westinghouse Electric Corporation
Model Reference:C250S50/DX4 (ANSI Code: S50VA-250/DX)
Lamp
Lamp Type:High Pressure Sodium
Filament/Radiator Type:Polycrystal Alumina (PCA)
Base:E39 (Mogul)
Shape/Finish:ET18
Service Life:10,000 Hrs.
Burning Position:Universal
Fixture
Ballast Type:S50 (USA)
Electrical
Wattage:250W ~
Voltage:100V ~
Current:3.0A ~
Optical
Lumen Output:22,500
Lumen Efficacy:90 LPW
Colour Temperature:2,400K ~
Colour Rendering Index:65% ~
Physical/Production
Factory Location:Bath, NY USA
Fabrication Date:7/82
Application/Use:Where better color rendering is desired.
File information
Filename:WC-C250S50-DX4-72-1.jpg
Album name:Cobrahead / High Pressure Sodium Lamps
Keywords:Lamps
Filesize:414 KiB
Date added:Mar 29, 2025
Dimensions:2048 x 1018 pixels
Displayed:15 times
URL:https://trad-lighting.net/gallery/displayimage.php?pid=719
Favorites:Add to Favorites

Comment 1 to 4 of 4
Page: 1

wide-lite 1000   [Mar 29, 2025 at 09:41 PM]
I wonder why they chose the 150w S-56 and the 200w ? Both were rather uncommon for anything other than streetlighting.
BT25   [Mar 29, 2025 at 10:49 PM]
Good question...if I'd been the deciding engineer, it would've been the 400W, and the 150W (52V) lamps. There's probably a good reason...
wide-lite 1000   [Apr 05, 2025 at 01:22 AM]
My thoughts exactly ! While they were at it , they should've made a 310w also ! Mr. Green
347vPowerlite   [Apr 05, 2025 at 01:52 AM]
I wonder if the 200w was an attempt at getting existing users with 400w MV highbays to convert to 200w deluxe HPS. The 150w S56 is a bit puzzling, I personally would have targeted the lower wattage lamps (along with a 200w or 250w), 100w for a 175w MV recessed can replacement and 50w or 70w for a 100w MV recessed can replacement.

Comment 1 to 4 of 4
Page: 1