A small room with dimensions 15 ft X 15 ft X 10 ft high contains air at 68 deg.F and 14.7 psia. It is the camera stage of a television broadcasting studio, and contains many bright lights for illumination. The room is closed, sealed, and insulated to isolate the performers from outside distractions. Find the temperature in the room 0.5 hour after six 800-w lights are turned on.