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| Lamp/Fixture Information | |
| Manufacturer: | Westinghouse |
| Model Reference: | H33-1-GL/Y |
| Lamp | |
| Lamp Type: | Mercury high pressure fluorescent (caution yellow) |
| Filament/Radiator Type: | Thermal discharge in argon and mercury vapor, and fluorescence |
| Base: | E39 |
| Shape/Finish: | Bulged tubular fluorescent, color coated |
| Service Life: | 24 kh |
| Burning Position: | Universal |
| Electrical | |
| Wattage: | 400 W |
| Voltage: | 140 V |
| Current: | 3.2 A |
| Optical | |
| Lumen Output: | 11,000 lm (initial) |
| Lumen Efficacy: | 27.5 lm/W (initial) |
| Colour Temperature: | 3260 K (yellow) |
| Colour Rendering Index: | 41 Ra8 |
| Physical/Production | |
| Factory Location: | Bath, NH, USA |
| Fabrication Date: | June 1969 |
| Application/Use: | Street lighting (illumination of dangerous sections) |
| File information | |
| Filename: | Westinghouse_H33-1-GL21Y_2m.jpg |
| Album name: | Max / Misc lamps and lighting |
| Keywords: | Lamps |
| Filesize: | 1655 KiB |
| Date added: | 30 Mar 2026 |
| Dimensions: | 1500 x 1500 pixels |
| Displayed: | 42 times |
| Software: | Adobe Photoshop 25.7 (Windows) |
| URL: | https://trad-lighting.net/gallery/displayimage.php?pid=1165 |
| Favourites: | Add to Favourites |
Comment 1 to 4 of 4 Page: 1 |
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Amazing as ever, would have loved to find one of these
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Thank you Ria. I'm quite happy to have that one in the Collection! Me too I never expected to get one until three showed up unexpectedly (those were divided between three collectors and it was my good fortune to be one of them).
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Amazing! Rare to see a picture of one, much less one lit up.
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Yeah, that's certainly not something you see every day.
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Comment 1 to 4 of 4 Page: 1 |
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Search![Westinghouse Caution Yellow mercury lamp in operation (view 2)
Here's a top view of the Westinghouse Caution Yellow mercury lamp in operation (see [url=https://trad-lighting.net/gallery/displayimage.php?pid=1166]there[/url]), showing the extremity of its clean mercury arc tube (the lamp is new) whose light is filtered by the yellow lacquered bulb.
Keywords: Lamps](albums/userpics/10005/10/normal_Westinghouse_H33-1-GL21Y_2m.jpg "Click to view full size image
==============
Westinghouse Caution Yellow mercury lamp in operation (view 2)
Here's a top view of the Westinghouse Caution Yellow mercury lamp in operation (see [url=https://trad-lighting.net/gallery/displayimage.php?pid=1166]there[/url]), showing the extremity of its clean mercury arc tube (the lamp is new) whose light is filtered by the yellow lacquered bulb.
Keywords: Lamps")
