I understand if for cinematographic purposes PJ wanted to keep things brighter if for no other reason than to differentiate it visually from
Helms Deep. But then why have
Gandalf go on to
Pippin about how the
orcs of
Mordor cannot bear sunlight, if only a few minutes later we see the orcs standing before
Minas Tirith in bright daylight? I know that Gandalf's talk was more or less taken from the book, but in terms of the internal logic of the movie, it didn't make sense to emphasize the orcs' need for darkness and then show them all gung-ho and ready for battle with sunlight streaming through their hair.
I enjoyed the EE, but this was one detail which I have to say I found very irritating.