The genuine Epson ELPLP31 ultra high efficiency (UHE) projector lamp is designed to replace the original genuine Epson projector lamp included with the Epson PowerLite 830p and PowerLite 835p Projectors. The ELPLP31 replacement projector lamp is rated at 200W. The lamp is user-replaceable. Projector lamp can be installed whether mounted in a ceiling or sitting on a table; refer to your projector's manual for installation instructions for this replacement lamp.