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Multi Vapor Halide Here’s another multi-vapor, labelled USA, halide lamp shown running. I really like the light temperature of this lamp is pretty close to tungsten. The colour is also very stable as I have run it on many different ballasts including 400W mercury and HPS gear. Shown here it actually running on a 250W HPS ballast. So, running a little under the rated wattage with a lamp voltage of 135V. I’m using one of my tough Thorn hi-bay ballasts and for the short run it doesn’t care not even showing sighs of heating up. Keywords: Lamps

Multi Vapor Halide

Here’s another multi-vapor, labelled USA, halide lamp shown running. I really like the light temperature of this lamp is pretty close to tungsten. The colour is also very stable as I have run it on many different ballasts including 400W mercury and HPS gear. Shown here it actually running on a 250W HPS ballast. So, running a little under the rated wattage with a lamp voltage of 135V. I’m using one of my tough Thorn hi-bay ballasts and for the short run it doesn’t care not even showing sighs of heating up.

SONunderSOX.jpg multimetal_halide.jpg SON_TS.jpg son_DC2.jpg lamp_dies.jpg
Lamp/Fixture Information
Manufacturer:GE
Model Reference:MVR400/U/40
Lamp
Lamp Type:Halide
Electrical
Wattage:400
Physical/Production
Factory Location:USA
File information
Filename:multimetal_halide.jpg
Album name:Tuopeek / High Pressure Sodium
Keywords:Lamps
Filesize:259 KiB
Date added:15 Nov 2025
Dimensions:2500 x 1713 pixels
Displayed:62 times
DateTime Original:2025:11:15 16:37:36
Exposure Time:1/2500 sec
FNumber:f/10
File Source:Digital Still Camera
Flash:No Flash
Focal length:25 mm
ISO:200
Model:NIKON D3400
Software:Adobe Photoshop Elements 2.0
White Balance:0
URL:https://trad-lighting.net/gallery/displayimage.php?pid=1054
Favourites:Add to Favourites

Comment 1 to 4 of 4
Page: 1

Max   [Sun 16 Nov 2025 at 10:04]
That's peculiar... standard GE MVR lamps are not designed to emit warm-white light. Their Na-Sc fill chemistry is balanced for the production of neutral-white light at 4000 K. The only condition such a lamp would radiate light at a (much) lower color temperature is if it has lost most of its scandium, which can happen at end of life. Is you lamp brand new? Is your picture (as it appears on your camera screen) really representative of the lamp's actual light color?
Tuopeek   [Sun 16 Nov 2025 at 11:42]
Interesting, the lamp is essentially new, although had it for a number of years now. I'd say the image has captured the colour just about right perhaps just a tad lower kelvin but not much at all.
Max   [Mon 17 Nov 2025 at 04:41]
Did you buy it, or was it given to you? What you have here is certainly a lamp with a clear manufacturing defect. Somehow, it did not get its full scandium dose, resulting in sodium dominating the lamp's spectral output, which explains the "peach" color of its emitted light. Can you take a picture of the arc so we can see its structure?
Tuopeek   [Mon 17 Nov 2025 at 15:44]
It was an eBay buy but I think from an electrical outlet. If it's faulty, I really like it. I'll get some more photos of it soon.

Comment 1 to 4 of 4
Page: 1