Electrified TXR774 Replacement Lamp for Optoma Projectors BRAND NEW REPLACEMENT LAMP WITH HOUSING WORKS WITH THE FOLLOWING MODELS TWR1693,TX774,TXR774 OPTOMA, TWR1693,TX774,TXR774,BL-FP280A,BLFP280A,BL-FU280A,BLFU280A,DE.581100173,DE581100173