Well i am new member to the list and everything and have only been been practicing magick for like 3 or 4 years now, but in that time i have had several incidents of seeing the blue light.i consider it to be very,very pure and protective.i have had visions where i have encountered demons who were trying to destroy me but before they were able to do so I emitted blinding bright blue light from my astral body which pretty destroyed/banished them to their place.i would like to exsplain the whole vision because it was vivid and intense, i have exsperienced the blue light on several ocasions, just let it be said,in my opinion that the blue light is very good to have around,i consider it be a light of very good and pure spirit.i would guess that the blue light you saw was emitting a protective aura around your body and room,what type of work were you performing,were you under any kind of astral attack at all?
thanks , my 2 cents, do what thou wilt shalt be the whole of the law