Is there such a thing as foot lambert being too high? If so, how high is too high? My room deminsions are 14L x 18W x 8H and there are no windows. I am looking to install a 100' 16:9 diagonal screen. At approx 11.5 to 12 ft throw distance I keep coming up with fl close to 30 and in some cases 40. I am having a difficult time figuring out if this is too high. Any thoughts would be appreciated.