ANSI LUMENS could be the mostly approved industry normal brightness measurement. The ANSI lumen ranking measures the brightest white that a projector can make by averaging 9 light meter measurements taken over the projected graphic. The InFocus IN138HD gives keystone correction for image alignment. Push the "Keystone" button on the https://in13826048.p2blogs.com/27710444/not-known-facts-about-in138