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Westinghouse 400w Mercury Vapor /W (White)
Lamp is at about 30% run-up on M-57 metal-halide ballast. At full brightness, it appears to have a very pleasant color. This is the first "new" /W lamp I have seen up close. The red rendering doesn't seem as bad as I'd imagined.
Keywords: Lamps

Westinghouse 400w Mercury Vapor /W (White)

Lamp is at about 30% run-up on M-57 metal-halide ballast. At full brightness, it appears to have a very pleasant color. This is the first "new" /W lamp I have seen up close. The red rendering doesn't seem as bad as I'd imagined.

003_1.JPG 001_1.JPG IMG_5009_2.JPG IMG_5003_2.JPG 004_1.JPG
File information
Filename:IMG_5009_2.JPG
Album name:don / HID
Keywords:Lamps
Filesize:126 KiB
Date added:Jul 06, 2011
Dimensions:1200 x 900 pixels
Displayed:227 times
Color Space:sRGB
DateTime Original:2011:07:06 00:09:39
Exposure Bias:0 EV
Exposure Mode:0
Exposure Time:1/60 sec
FNumber:f/3.2
Flash:No Flash
Focal length:11.1 mm
Make:Canon
Model:Canon PowerShot S2 IS
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=7244
Favorites:Add to Favorites

Comment 1 to 9 of 9
Page: 1

GEsoftwhite100watts   [Nov 12, 2014 at 05:19 PM]
Pretty! Any idea on the year yet? 60s I'd guess...
streetlight98   [Nov 12, 2014 at 08:37 PM]
Nice! I have an NOS late 60s Sylvania 400W /C cleartop. My only /C lamp. Really cool. Wish I had more since I like the color. Never had a /W lamp though. Is it similar kelvin-wise to a /W fluorescent tube?
GEsoftwhite100watts   [Nov 14, 2014 at 02:13 AM]
Nah more like /D from what I understand but I've only seen /DX in person.
streetlight98   [Nov 14, 2014 at 02:55 AM]
Ah I think the /N lamps are similar to /CW or /W though. They're warmer and were popular in supermarkets before MH lamps became popular.
joe_347V   [Nov 17, 2014 at 02:35 PM]
Nice! I have a used GE 175w /W and to me it sorta looked like a 5000K or even a daylight fluorescent. I have a late model /N which sorta looked like a yellower /DX. Apparently the earlier /Ns were a lot warmer than /DX.
GEsoftwhite100watts   [Nov 17, 2014 at 04:25 PM]
Yeah I remember you comparing it to a /DX.
streetlight98   [Nov 18, 2014 at 01:31 AM]
Yeah I heard the older /Ns actually used a different phosphor but from what I understand, they just use regular /DX phosphors with a yellow tint to them.

With a cobrahead, you can achieve the effect of a /N lamp with a /DX MV lamp and a browned out polycarbonate lens. I do that in my room sometimes. Right now I have my 175W MV M-250R1 in my room with a clear lamp and a busted browned out lens, so it's a yellowish green color with a streak of blue-white through the center of the refractor where the refractor split open about 1/4". It had a crack and I dropped it and split it so now it can mimic pacman, not quite cracked in two, but split down the middle with only the backside holding the two halfs together lol.
don   [Nov 20, 2014 at 06:38 AM]
If I get some spare time, I want to compare a /DX, /C, and /W in 175w in a pic. Unfortunately, they'll be different brands but at least might give somewhat an idea of phosphor difference.
streetlight98   [Nov 20, 2014 at 12:01 PM]
Ahh that sounds really interesting to see. Smile

Comment 1 to 9 of 9
Page: 1