Closeup run-up and hot restrike of my 70W R7s green thallium lamp
[url]https://www.youtube.com/watch?v=bNpNK0rZ2yI[/url]
[url]https://www.youtube.com/watch?v=U1BsqVD7uKg[/url]
It runs up very fast and hot restrikes within less than 2 mins.
A phenomenon that I don't understand is what all the black stuff in the arctube when it is cooling down?

Closeup run-up and hot restrike of my 70W R7s green thallium lamp

https://www.youtube.com/watch?v=bNpNK0rZ2yI
https://www.youtube.com/watch?v=U1BsqVD7uKg
It runs up very fast and hot restrikes within less than 2 mins.
A phenomenon that I don't understand is what all the black stuff in the arctube when it is cooling down?

20190813_190337.jpg Unbranded_5__65-80W_BC_Daylight.JPG Image_from_iOS_2812829.jpg IMG_20160120_225907.jpg image~74.jpeg
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