Extremely bright white (sometimes greenish) flashes of light blocking house windows. Central Scotland.My teenage daughter woke up the other night (3 am) to extremely bright lights in her window. She sat up in bed and watched them for about 15 minutes as she said she knew it wasn't anything she'd seen before (not lightening, headlights, etc.) She then woke up my other daughter and they watched the lights together. At 3:30 am they woke me up to see the lights. Both were visibly scared. The light was very bright, white and sometimes had a green tint. It came in flashed occuring every 3 to 4 minutes or so. We live in the country but do have a few houses near us. I wanted to call our neighbours to see if they could see the lights too but as it was 3:30 am I didn't feel I should. Now I wish I had. We saw no object and heard no noise, just this extreme bright light that completely blocked out the windows, lasted all of 1 or 2 seconds each time and went away (a flash). Again, I have seen numerous lightening storms in my life and have never come across anything like this. I am so curious as to what could have caused this. If I hadn't been so tired and if we didn't have to get up for work and school the next morning I would have stayed up as late as possible to investigate more. The only explanation we could come up with are the Northern Lights or Aurora Borealis. However, everyone I have spoken to have said they don't usually flash in this way and come "into" or up to windows.((NUFORC Note: Witness elects to remain semi-anonymous; provides e-address only. PD))