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Westinghouse Lifeguard H33-1GL/DX (H33GL-400/DX) Deluxe 400W Mercury Vapor Lamp Early version with the small font etch... Keywords: Lamps

Westinghouse Lifeguard H33-1GL/DX (H33GL-400/DX) Deluxe 400W Mercury Vapor Lamp

Early version with the small font etch...

WL-H33GL-400-R-76.jpg WL-H33GL-400-N-38.jpg WL-H33GL-400-DX-40-1.JPG WL-H33CD-400-75-1_0.jpg SU-ULX880-113-1_0.jpg
Lamp/Fixture Information
Manufacturer:Westinghouse Electric Corporation
Model Reference:H33-1GL/DX (H33GL-400/DX)
Lamp
Lamp Type:Mercury Vapor
Filament/Radiator Type:Fused Quartz
Base:E39 (Mogul)
Shape/Finish:BT37
Service Life:24,000 Hrs +
Burning Position:Universal
Fixture
Ballast Type:H33-1
Electrical
Wattage:400W ~
Voltage:130V ~
Current:3.25A ~
Optical
Lumen Output:23,000 (Initial) / 19,100 (Average)
Lumen Efficacy:58/48 LPW
Colour Temperature:4000K CCT ~
Colour Rendering Index:45% ~
Physical/Production
Factory Location:Bath, NY USA
Fabrication Date:4/70
Application/Use:Roadways, Parking Lots Etc.
File information
Filename:WL-H33GL-400-DX-40-1.JPG
Album name:Eric / Lamps
Keywords:Lamps
Filesize:425 KiB
Date added:01 May 2026
Dimensions:2048 x 1231 pixels
Displayed:14 times
URL:https://trad-lighting.net/gallery/displayimage.php?pid=1235
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Comment 1 to 3 of 3
Page: 1

Max   [Fri 01 May 2026 at 17:19]
That's an early one, with a phosphor material sourced in from Sylvania.
Eric   [Sat 02 May 2026 at 02:58]
I've heard that Westinghouse bought it from Philips... Wonder
Max   [Sat 02 May 2026 at 05:42]
That came later, in 1972, when they switched from Sylvania's yttrium vanadate material, which was plagued by a poor maintenance (that was in the early days of the technology), to Philips's superior yttrium phosphovanadate material developed in the late 1960s.

Comment 1 to 3 of 3
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