well... seeing as I just saw one of these blue lights, first thing I had to do was google it
I'm a spiritual person, although for me mostly seeing is believing and I follow no religion - other than that I believe in something greater than us, and in a spiritual world.
Sooo... I'm just getting ready to take the 2 kids out (I'm 34, they 4 & 6) light is off in their bedroom, and as I walk in, open the wardrobe, a t-shirt falls out - so I pick it up.... and as I pick it up, I glance over at their beds and notice a blue light on top of the duvet cover.
As it's dark, I presumed it was a light on one of their many toys, it disappeared after 2-3 secs.
Upon checking the bed.... I was kinda surprised to find - no toys...
Now I'm a bit of a skeptic and always believe in what I see (generally), so accept various explanations for different phenomena until I actually SEE it myself.
On this occasion I'm feeling a little enlightened lol - there was no movement of the light, it wasn't "in front" of my eye - it was about the size of a Blue LED and was sat firmly ON the duvet cover (ie - it didn't move as I moved my head (and I was in the process of standing up from picking up the t-shirt).
Thought I'd share that with you as it's only just happened!