This is for people who are interested in health and well-being. Cahlen built his own violet ray device to find out if there actually was anything to the stories. His results so far have been pretty unequivocal.

I would watch these two short latest videos he did.

https://cahlen.org/exercising-with-the-plasma-machine/

https://cahlen.org/it's-alive!/

If you want to learn about the technology and possibly build your own, he put out another video on how he did it. Go through his recent videos on his website to find it.