Strange phoenomenon in my no-name 70W thallium lamp « on: July 18, 2024, 01:48:32 PM » Author: dor123
There is a strange phenomenon in my 70W R7s thallium lamp: https://www.lighting-gallery.net/gallery/displayimage.php?pos=-246736 https://www.lighting-gallery.net/gallery/displayimage.php?pos=-246684 After the first use, the arctube blackened and it continues to looks like this to the present day. What is this blackening? It don't changes to liquid or disappears when the lamp is hot.
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