The GP20 actually puts out up to 700 lumens of light output, which, in my opinion, is the point at which you can begin to think of it as acceptable for large screen viewing in a light controlled room.
GP20 n'emeputa ihe ruru 700 lumens nke mmepụta ọkụ, nke m chere, bụ ebe ị nwere ike ịmalite iche na ya dị ka ọ na-anakwere maka nnukwu nlele ihu igwe n'ime ụlọ a na-achịkwa.