CTLAMP RLC-150-003 Projector Lamp with Housing RLC-150-003 Replacement Projector Bulb for Viewsonic PJ550 PJ550-1 PJ550-2 PJ551 Brand New Replacement Lamp with Housing for VIEWSONIC Projector Part number: RLC-150-003 Compatible models: for Viewsonic PJ550 PJ550-1 PJ550-2 PJ551 Rate power: 150watts Up to 2000 (normal) / 3000 (economy) hours with 30 days Refund & 120 days Warranty