In my experience various physical world phenomena occurs, sometimes in conjunction with a deep meditation experience. Since I have found no ability to change the world through deep meditation, as much as I wanted to; thus, I have had to conclude that any observable correlates fall most probably under the category of coincidence.
I am well aware that the new-age world commonly believes that much of the charismatic phenomena that many of us here have reported is of electromagnetic origin; nonetheless, I see no correlation at all, other than a similitude.
Like Cal, since I have worked with electricity for decades, then I too have been present for high voltage and high current events, none of which had any sensory effect upon me beyond what anyone else who does not meditate would experience.
However, I frequently have the experience of flashes of light or increasing glowing light experienced while in meditation. Since I live in a van, then sometimes I open my eyes expecting to see the bright lights of an automobile, but I find it is dark, so I close my eyes to meditate and find the bright light is coming from within.
So, Alexander it sounds more like the charism of light is arising in you.