There’s a page on the Brilliant Light Power website where the company is uploading a series of videos of their plasma SunCell in operation. The most recent video includes this caption:
“Controllable high power density events were achieved while avoiding electrode melting and vaporization. Video shows over two minutes out of a one-hour run.”
They had previously reported that in earlier demonstrations, their molybdenum-lined cell and tungsten electrodes had melted and vaporized in a few seconds. As far as I can find, however, they have not yet published reports providing calculations of energy in vs. energy out (COP) of the cells we are seeing in these videos, which would be important information to know as BLP is claiming their technology is a revolutionary new energy production technology.
Videos can be seen at this link: http://brilliantlightpower.com/plasma-video/