With up to 5000 lm of brightness the pt ew540e serves up brilliant punchy images even with the lights on text is sharp and clearly legible while graphics photos and video images are reproduced with a clean and natural vibrancy expect dazzling highlights and inky blacks with a high contrast ratio of 2 0001 assisted by an iris which alters brightness according to the scene or image this projector is perfect for use in environments with an high amount of ambient light classroom and board