I am trying to figure out why w the markii when white balance at 3200 that led lights set to 5600k used in the background(in this case to resemble moonlight coming through blinds) look purple instead of blue? Any ideas? It has happened on two different occasions w two different set of led lights. Shooting on 5d mark II, full manual mode, wide open aperture at 2.8,.....it does seem to improve color if I shut down aperture, but picture becomes too dark. Thanks!