There is an abundance of spiritual people, particularly practitioners of the western new age movement, to identify minor phenomena like flashing lights observed with the eyes or minds eye, with 'beings' of some sort.
In my experience flashes of colour and light are more a sign of the brow centre being stimulated in some way. This stimulation could come from any number of things. Usually though the brow centre stimulates itself at seemingly unimmportant times and thereby the viewer catching glimpses or bursts of energy.
We could also observe that perhaps the flash of light is not something that is in the etheric or astral but actually a symptom of the brow centre being stiumlated.
Also, not to confuse 'stimulation' with 'fully active and functioning'. Stimulation like i mentioned can come from many a number of things like direct mental exercise, over exposure to light etc. Headaches, and time periods during the day, like very early morning and sunset and sunrise can also produce a stimulation in the brow. Very emotional times as well.
This is of course my own personal experience with brow flashes. I have had the odd gold here and there, but mine were always purple, white and blue. I dont get them so much anymore.
Angels are really powerful too. They can manifest in the physical right in front of you according to the experience of some others i know. Particularly powerful spirits can manifest themselves into the physical as well. The spirits i heard of though were ancient Maori in New Zealand who wanted a piece of their war canoe back.
With your particular case i would put it down to just the effects of slight stimulation to the brow centre. Enjoy them!
EDIT: I will add however, something i forgot to mention is that nature spirits are very common little beings that become attracted to certain environments and people for various reasons and they are often seen as little flashes of light. These nature spirits are more common to see as little flashes and orbs, rather then angels and masters etc.
Last edited by HiImJeremy; 07-09-2011 at 06:14 AM.
Reason: Additional information upon reflection.