I really like the craftsmanship on these. As a collector of interesting vacuum tubes and spectral lamps, this is something I want. I don't exactly understand w

I really like the craftsmanship on these. As a collector of interesting vacuum tubes and spectral lamps, this is something I want. I don't exactly understand what these are. the 'about page' mentioned it was some proprietary tech. Is is basically like an LED in a vacuum tube without the epoxy casing to absorb heat?