Optoma 5811100256-S Projector Lamp Replacement Northstar AV sells OEM (Original Equipment Manufacturer) Lamps - Philips, Osram/Sylvania & SHP brand lamps inside of OEM spec housings. We DO NOT sell generic or compatible replacement lamps. Projector Lamp Model: 5811100256-S Compatible Projectors Models: Optoma ES520 Optoma ES530 Optoma EX530 Optoma TX735 Average Lamp Hours: 2000-3000 Hours Warranty: 180 Day Warranty (From Date of Install)