I think what you are discribing is some sort of ascended state of mind. I experience the same thing, I saw some sort of strobing effect one time while trying to project, but it faded as I stopped rasing energy and became restless out of failure, again. When I meditate outside in the day time, after about 15 or 20 minutes I start to get these psychadelic visuals of different hues of like black and silver and grey all mixing together and intertwining, it's really cool. The first time this happened, I was like Whoa! cus this white light kept on circling my view (with my eyes closed) and forming like a ball or orb of some sort and then just went down, down, past my view. It did this over and over again and each time the orb thing would get bigger and bigger, until it was all that I could visually see, and this was when all the stuff started happened while I Med. Then, when I open my eyes, all of my view is in this peculier blueush hue, then returns back to normal after a couple of minutes. I think this has to do with the fact that most spiritualists say your brow chakra is an indigo color (light blue). I'm guessing when you stimulate this area emmensely, I guess It kind of intesifies the power of the color....?