My wife and I are currently staying in a holiday apartment in France and a couple of days ago we think we started seeing the same white flashes in our baby's room at night. We know there's no possibility of external light sources as our baby's room is completely blacked out at night with shutters closed outside the window, blackout covers inside the window and curtains drawn. The first time my wife told me about it I just dismissed it saying the door must have been open while she was in there and I must have been going to the bathroom at the same time but she swore it was a white light like a camera flash that lit up the entire baby's room from the inside rather than a sweeping yellowish light like that from another room. She was wide awake at the time and said she saw everything in the room. Then I remembered I had been in the room with the baby a few nights before and although my eyes had been shut I saw a bright flash through my eyelids but when I opened my eyes it was dark. At the time I was convinced my wife had walked in and flicked the lights on but since there was no-one there and it was dark when I opened my eyes I just put it down to being tired and didn't think much more of it until my wife saw the flash. We got a bit freaked out as my wife is a little superstitious and started putting ideas into my head about paranormal stuff so we swapped rooms with our baby and tried to stay awake so we could catch it happening again but it hasn't happened again so far. Trying to be more rational about it, I was thinking there are so many possibilities of what this could be since we're in an apartment block with people above and below us. The floors are carpeted so static could easily be being generated and there's an elevator shaft nearby. There's a maintenance closet in the hallway outside our apartment which is next to the baby's room which probably has the electrical circuits running into it so it probably has a good grounding point in there. My conclusion to all this is that it's just static electricity building up and once the potential difference reaches a certain point or when there's a disturbance such as one of us walking into the room there's a discharge to ground and flash of light. We also have a big rubber exercise ball we sit on when we're rocking the baby to sleep which is very likely a source of static charge. Either that or we're just sleep deprived from the baby waking and it's all in our heads! A friend of ours who used to live in France said he's seen these flashes of white light too and apparently French hotels are notorious for it as they don't ground things properly. A lot of continental european electrical appliances such as the bedside lamps just have the two prongs with no earth pin (like US plugs) so that could be contributing to the problem. There's also very low humidity where we are just now which makes for worse static electricity. After our friend told us he'd seen it too and it was frequent occurrence over here it did put our minds at rest so hopefully other people will read this and won't freak out!