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50w Iwasaki EYE H50 Clear Mercury: Full power 1 x 50w Iwasaki Eye H50 mercury vapour lamp at full power. It's quite interesting that it has dual starting probes but only one is connected.

50w Iwasaki EYE H50 Clear Mercury: Full power

1 x 50w Iwasaki Eye H50 mercury vapour lamp at full power.

It's quite interesting that it has dual starting probes but only one is connected.

387A4886.JPG 387A3220~0.jpg 387A0520.JPG 387A0486.jpg 387A7509.JPG
File information
Filename:387A0520.JPG
Album name:FrontSideBus / HID: Mercury Vapour
Filesize:3770 KiB
Date added:11 Apr, 2026
Dimensions:3072 x 2048 pixels
Displayed:208 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=24443
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Comment 1 to 8 of 8
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Beta 5   [11 Apr, 2026 at 09:38 PM]
Excellent shot, so cool to see the arc up close like that Cool
Danny   [12 Apr, 2026 at 01:12 PM]
Stunning!
dor123   [12 Apr, 2026 at 01:16 PM]
The arc is unusually constricted for a mercury arc. How a DyI arc would be compared to it (DyI arc is very constricted and as a result very unstable).
AngryHorse   [12 Apr, 2026 at 02:53 PM]
What trick allows you to zoom in so much without bleaching out the image? Cool
FrontSideBus   [12 Apr, 2026 at 03:25 PM]
I use a 180mm macro lens together with a small aperture of f16 which gives good depth of field without loosing too much sharpness.
Naturally an ND1000 filter is used to reduce the light going into the lens, you can literally see the above image through the viewfinder!
dor123   [12 Apr, 2026 at 04:34 PM]
Regarding to the starting electrodes: In EYE MV lamps, both of them are connected to the same resistor.
FrontSideBus   [12 Apr, 2026 at 05:59 PM]
Well in this lamp, as can be seen in the other photo, one isn't connected to anything. And secondly, how would that even work? One end of the lamp would have the starting electrode at the same electrical potential as the adjacent electrode. A photo I uploaded a while ago of an 80w lamp clearly shows two resistors, one for each side.
Alex   [12 Apr, 2026 at 06:29 PM]
dor123 are you sure about that? I have never seen that an technologically i does not make any sense...

Comment 1 to 8 of 8
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