This is a high quality projector wick, high brightness, long life, excellent visual effects, so that you can experience the same hd images as the cinema at home. Bulb model: NP17LP Working hours :3000-4000 hours Warranty period :200 days Bulb type: Projector Lamp Bulb with housing Applicable model: NEC NP-P350W NP-P420X P420X M300WS M350XS M420X M300WSG M350XSG P350WG M420XG M420XM M420XV M420XVG NP-M300WS NP-M420XG NP-M420XVG NP-P350W NP-P350WG NP-P420X NP-P420XG P350W P350WG P420XG UM300W UM300X UM330M UM330W UM330Wi UM330Wi-WK1 UM330X UM330X-WK1 UM330Xi-WK1 with HousingWhen to change projector bulbs: When the projector indicator light flashes orange, the projected image becomes darker or blurrier than before.When the projector is on, the message to change the light bulb will appear on the screen. In order to get a good projection effect, it is recommended that you change the light bulb.How to replace projector bulbs: 1. Turn off the projector and unplug the power cord 2. Let the projector cool for at least an hour. The bulb is very hot after use 3. Use a screwdriver to remove the screws from the lid and slide the lampshade open Loosen the two screws holding the bulb in place 5. Hold the bulb and pull it out straight 6. Use the opposite steps to place the new bulb back in the projector and tighten the screws 7. Reinstall the lampshade and reset the life of the bulb 8. Installation is completeNote: 1. Before purchase, please confirm that the bulb of this projector is compatible with the projector. If you cannot find the model of the projector on the page, please contact us 2. To avoid burns, allow the projector to cool for at least 60 minutes before changing the bulb