Hi ive just been searching what this could be, and i haven't found anything that could say what it is, hows its caused or anything! I get exactly the same thing but i also get it indoors and at any time of day, and i cant really find any factors/conditions that would affect it, i went to the doctors and they put it down to migraines because i also suffer with those, they also suggested i go to the opticians but that hasn't helped either, plus its definitely not "floaters" because everyone has those and most people could describe them as a line or wobbly line but these lights are so bright and they look almost like shooting stars....