CTLAMP NP23LP 100013284 Quality Replacement Projector Lamp Bulb with Housing for NEC NP-P401W / NP-P451W / NP-P451X / NP-P501X NP23-LP Type: High Quality Replacement Lamp Bulb with Housing Part number: NP23LP / 100013284 Model number: compatible with NEC NP-P401W / NP-P451W / NP-P451X / NP-P501X Wattage & Lifespan: 270 Watts; Up to 2500 (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