" You have no subtlety, Potter, " said Snape, his dark eyes glittering. " You do not understand fine distinctions. It is one of the shortcomings that makes you such a lamentable potion-maker."
If you're going to get 1000 lux at your eye, it honestly doesn't matter if it's a warm source or a cool source, that's too high and you're already saturating your circadian system.
Somewhere in the bowels of the earth he came on the elegant little box that was the Criterion's auditorium; a little ghostly in the cold light of unshaded electrics, but reticent and well-bred.