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Blackening appearing in the arctube of my 70W green thallium lamp [img]https://i.postimg.cc/hPP6VwC0/IMG-8300.jpg[/img] This blackening appearing 5 days only after the first use. Even after the first use, there was blackening at the ends. What is this???

Blackening appearing in the arctube of my 70W green thallium lamp


This blackening appearing 5 days only after the first use. Even after the first use, there was blackening at the ends.
What is this???

IMG_8174.JPG IMG_8240.JPG IMG_8299.JPG Screenshot_20240522_142507_Gallery.jpg DSC00712.JPG
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Filename:IMG_8299.JPG
Album name:dor123 / Lamps
Filesize:1007 KiB
Date added:16 May, 2024
Dimensions:2048 x 1536 pixels
Displayed:10 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=20820
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AngryHorse   [18 May, 2024 at 10:01 PM]
Never owned any coloured halides?, maybe it just something these do?
dor123   [19 May, 2024 at 08:55 AM]
I didn't seen this phenomenon in any other colour MH lamp. In my former Venture MH-DE 70W/UVS/GDX lamp, there were slightly end blackening and huge amount of thallium that looked black, both when hot and cold.
Also: That whole blackening afterglowing when turning off the lamp, as if it was the liquid thallium itself.

Comment 1 to 2 of 2
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