Viewsonic PJD5351, 2500 ANSI lumens, DLP, XGA (1024x768), Lamp, 3000 h, 4000 h Viewsonic PJD5351. Projector brightness: 2500 ANSI lumens, Projection technology: DLP, Projector native resolution: XGA (1024x768). Light source type: Lamp, Service life of light source: 3000 h, Service life of light source (economic mode): 4000 h. Focus: Manual, Digital zoom: 1.2x. Serial interface type: RS-232. Noise level: 30 dB https://www.projectorcentral.com/viewsonic_pjd5351_classroom_projector_review.htm The Viewsonic PJD5351 is a powerful little package for the classroom. Pushing 2500 lumens, this short-throw XGA projector is a perfect companion to a laptop and a rolling cart. With a low upfront cost and minimal maintenance, the PJD5351 is an affordab... The Viewsonic PJD5351 is a powerful little package for the classroom. Pushing 2500 lumens, this short-throw XGA projector is a perfect companion to a laptop and a rolling cart. With a low upfront cost and minimal maintenance, the PJD5351 is an afforda...