Sparkling Lights

I mentioned this before in another post but I wanted to learn more about it. Ever since I started trying to communicate with angels and what not, I've been seeing them a lot. More than usual anyway. These little sparkling lights, usually a blue, purple, silver color. Some times I thinks it's the result of looking at something bright, but they just come out of nowhere, and have been very vivid and clear. I wanted to know more about what they are and what they could mean.

Thanks in advance!