light meter

  1. Bubby4j

    Measuring Ambient Light For Required Projector Brightness

    I'm trying to determine how bright of a projector we need in our church's auditorium. Right now we have 2 Panasonic PT-DW5000U projectors per screen with the image from each projector stacked on the other (we have 2 screens). Each projector is supposed to be 4,500 lumens so we'd have a...