BTBS 100% Brand New Compatible Lamp with Housing BL-FP180E / SP.8EF01GC01 for OPTOMA ES523ST EW533ST EX542 GT360 GT700 GT720 TX540 TX542 DW531ST EX540 ES523ST, EW533ST, EX542, GT360, GT700, GT720, TX540, TX542, DW531ST, EX540