I think this is an extreme ecxample, in that most will not have that result, myself included. It's a known fact that the screen uses up much of the battery.Leave it on full 100%. Everything looks so much better and the AMOLED screen uses very little power even at full.
From max charge to dead, "Display" used a total of 8% of my battery on full brightness. I think that is pretty damn good for enjoying your amazing screen.