@ChrisBoyMonkey -- According the spiritual path called Eckankar, the appearance of a blue light (in various forms, such as a pinpoint, a star, a ball, etc.) is a significant spiritual event in a person's life. This
STORY is just one of many I've read from people who've had that experience. @Heavyantra
@Star64 @R. David Case @Daniel Lion
To science, the kind of experience described in the above linked story would be inconclusive (to be generous). But to the person who has this kind of experience, it can become a bit of a dilemma. Do I accept it as real and of value, or do I reject it because my rational mind says it can't be real? Our decision often comes down to how much we trust our sense of discernment.
What helps me make a decision on the validity of an experience like this or something similarly "different", is to note if I feel a sense of love accompanying it. If so, then it tells me I'm experiencing something very real, and science really isn't going to have much of a clue about it. As far as I know, they've never tried to measure love.
BTW, here's a
LINK to a 3-min. introductory video on singing HU (which is mentioned in the above linked story).