AuraBeam Professional Replacement Projector Lamp for BenQ W770ST With Housing (Powered by Philips) Aurabeam Projector solutions. From the economic to the professional versions our lamps ensure great quality Professional Series: High end quality option for your projector.Bring back the day one brightness of your Device. Easy install: Housing included, minimize installation time to make sure your device is back in action! Contact: Do you have an issue or question regarding the lamp or the compatibility of your device? Email us, our Customer Service is here to help you. User Protection: The Professional series lamps include a 180 day replacement warranty and a 30 day refund warranty