The advanced Sharp DLP Optical Engine with DMD and dual 250W high-brightness lamps reached XG-4000 ANSI lumens brightness and superb PH50X high homogeneity, a vivid and detailed images on a large bright rooms. Select the location of the lamp in accordance with your needs. With dual lamp projection XG PH50X offers high brightness images in a huge room: 4000 ANSI lumens in standard mode and 3,000 ANSI lumens in Eco-mode. Another projection lamp provides enough brightness for large rooms, on average: 2000 ANSI lumens in standard mode and 1,500 ANSI lumens in Eco-mode. Disposable tubes also reduces the frequency of lamp replacement. Plus, even if one lamp goes out, can achieve power projection, be with other lamp without interruption.