CTLAMP RLC-091 Original Bare Projector Lamp Bulb P-VIP 240/0.8 E20.8 for Viewsonic PJD6544W Projector Lamp Type: High Quality Original Projector Bare Lamp/Bulb Part number: RLC-091 P-VIP240/0.8 E20.8 Model number: For VIEWSONICP PJD6544W Up to 2000 (normal) / 3000(economy) hours Life Guarantee: 30 days Refund & 150 days Warranty; professional customer service support. Any other problems with the projector lamp, please contact us