CTLAMP Replacement Projector Lamp with Housing for Emp-TW520/ Emp-TW600/ Emp-TW620/ Emp-TW680/ Powerlite PC 800/ Powerlite HC 550/ Powerlite HC 400 Type: brand New compatible projector Lamp with housing Compatible machine model: for emp-tw520/ emp-tw600/ emp-tw620/ emp-tw680/ PowerLite PC 800/ PowerLite HC 550/ PowerLite HC 400 Up to 2000 (normal) 2500(economy) hours life Guarantee: 30 days refund & 120 days warranty; Professional customer service support. Any other problems with the projector lamp, Please contact us