Lamps can be purchased from our Web store link below:


https://www.viewsonic.com/parts/pj/accessories/lamp.html 



You can find the specific model of your projectors lamp from the Datasheet that can be found in the downloads section of the projectors product page. 

Lamp models will have the following identification format: RLC-xxx

Example: PX727HD projector uses RLC-120 lamp