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Thorn 1000w CSI PAR64: The surface of the sun! Sorry for the soft image, I was shooting through the quite thick and curved front of the PAR lamp. Glowing great balls of halide! The discharge fills up the entire of the arc tube! There is 15 amps going through that fairly small arc gap! 1,500,000 CCD!

Thorn 1000w CSI PAR64: The surface of the sun!

Sorry for the soft image, I was shooting through the quite thick and curved front of the PAR lamp.
Glowing great balls of halide! The discharge fills up the entire of the arc tube!
There is 15 amps going through that fairly small arc gap!

1,500,000 CCD!

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File information
Filename:387A2479b.JPG
Album name:FrontSideBus / HID: Metal Halide
Filesize:1154 KiB
Date added:21 Feb, 2022
Dimensions:1920 x 1281 pixels
Displayed:22 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=17608
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Comment 1 to 5 of 5
Page: 1

AngryHorse   [22 Feb, 2022 at 11:27 AM]
I wonder what the pressure raises to inside there?
FrontSideBus   [23 Feb, 2022 at 02:55 PM]
Probably not as much as you'd think as such a low arc voltage of 70-85v would not be able to keep going surely?
Lightbulbfun   [23 Feb, 2022 at 03:11 PM]
arc voltage is influenced much more by the design of the lamp then the pressure it runs at, a classic example is a xenon XBO lamp, its well known they run at stupidly high pressures however they only have an arc voltage in the 20-40V range, (id love to see you photograph one of those up close like this this! Smile )
FrontSideBus   [23 Feb, 2022 at 03:30 PM]
That's true and I did think of those but those arc gaps are tiny compared with these and they run on DC so don't have to keep reigniting with every AC cycle.
dor123   [15 Apr, 2024 at 02:38 PM]
The lamp contains tin-thallium-sodium-lithium. The arctube seems to be unsaturated, as how it looks when hot.

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