Board Thread:Theories and Speculation/@comment-27924662-20160817160245/@comment-26369387-20160818152340

@Namikazenaruto9 1) Possibly.

2) Except they didn't open any windows, the only thing that was opened was a door by servant. And even if door wasn't opened, it would have not mattered since, as Madara said, the light of IT will "impenetrate even the deepest shadows", meaning walls or windows and doors closed would have not protected them from IT.