Viewsonics pjd7223 is a 4000 lumens and 15 0001 projector for medium sized rooms that delivers clear bright and sharp images with vivid and accurate colors even in bright environments this projector features dynamiceco technology to adjust lamp brightness thereby prolonging the lamp lifespan lowering power consumption and reducing the total cost of ownership by pressing the deco button on the remote control the presenter can dim the screen to refocus the audiences attention to the p