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Mercury Cadmium colour comparison

Mercury Cadmium colour comparison

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On the left is a 40W mercury lamp running slightly under power to compare the light from the Cadmium spectral lamp on the right. Shown with a white background both lamps produce some UV content. The spectrum from both lights are added as inserts on the image for information.

Hg_Cd_lamps.jpg Phil_Cd.jpg xenon_trig.jpg SON_T35W.JPG

Light Information

Light Information

Manufacturer:Eye, Philips

File information

File information

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Filename:Hg_Cd_lamps.jpg
Album name:tuopeek / High Pressure Lamps
Keywords:Lamps
File Size:288 KB
Date added:Sep 12, 2018
Dimensions:2370 x 1758 pixels
Displayed:104 times
Date Time:2018:09:12 13:03:10
DateTime Original:2018:09:12 12:44:43
Exposure Bias:0 EV
Exposure Time:1/250 sec
FNumber:f 5.3
Flash:No Flash
Focal length:46 mm
ISO:450
Make:NIKON CORPORATION
Model:NIKON D3400
Software:Adobe Photoshop Elements 2.0
White Balance:0
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-150822
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dor123
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Sep 12, 2018 at 06:33 AM Author: dor123
The cadmium is bluer than the MV lamp, due to lack of green lines, but it does have a red line and cyan lines. Zinc would be much bluer, as it emits in shorter blue wavelengths.

I"m don't speak english well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I hope that LED won't replace all forms of other light

rjluna2
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Robert


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Sep 12, 2018 at 07:34 AM Author: rjluna2
That's clears up the difference colour between those two discharge lamps

Pretty, please no more Chinese failure.

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Sep 12, 2018 at 11:59 AM Author: DimBulb
This is a great pic!!!

My very first word was LIGHT!

tuopeek
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tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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Sep 12, 2018 at 01:24 PM Author: tuopeek
thanks
arcblue
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Sep 12, 2018 at 02:37 PM Author: arcblue
I assume it wasn't economical to commercially produce cadmium vapor HID lamps? It's very pretty.

I'm lampin...

dor123
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Sep 13, 2018 at 03:01 AM Author: dor123
Cadmium requires very high loading on the arctube compared to the mercury to get optimum pressure. Also, it is very corrosive toward the quartz in a pure metal form. This is exactly what led to the invention of the metal halide lamps.

I"m don't speak english well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I hope that LED won't replace all forms of other light

HomeBrewLamps
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SodiumVapor 105843202020668111118 UCpGClK_9OH8N4QkD1fp-jNw majorpayne1226
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Sep 13, 2018 at 09:05 AM Author: HomeBrewLamps
Nice Pic!

--Owen

High Pressure Sodium Scavenger, Urban Explorer, Lighting Enthusiast and Creator of homebrewlamps (Duh lol) Cool High Pressure Sodium

High Pressure Sodium Sodium lighting is king!

tuopeek
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tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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Sep 13, 2018 at 02:55 PM Author: tuopeek
Thanks.

I initially thought Cd lamps would have no commercial application due to poor efficiency. However, Philips catalogue states 17W for this lamp. I measure the lamp draws just over 1A and has 16V across when up to temperature. So, while not a lot of light it is only 17W and probably similar for a mercury. Horrible volt-drop for a ballast though and know idea on lamp life.
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SPTSuperSprinter156
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Sep 13, 2018 at 03:54 PM Author: Cal
An interesting specimen nonetheless. I have a mercury spectral lamp, which is of course just a mercury arc tube in an unusual bulb. What’s unique about it is it appears to be a medium pressure arc tube but in a smaller size than the commercially avilable wattages - around half the size of a 250W arc tube.

http://www.lighting-gallery.net/gallery/index.php?cat=11976

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tuopeek
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tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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Sep 14, 2018 at 10:19 AM Author: tuopeek
Thanks, if it's a Philips lamp like this one: https://www.lighting-gallery.net/gallery/displayimage.php?album=1826&pos=40&pid=55945 , it might be a low pressure mercury.
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SPTSuperSprinter156
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Sep 14, 2018 at 11:12 AM Author: Cal
It’s not, it’s an osram. Didn’t consider that it could be low pressure mercury though, guess it may well be.

http://www.lighting-gallery.net/gallery/index.php?cat=11976

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