Light Engineered Displays, Inc. - Annunciators, Protective Covers, Water Leak Detection This is alternative content. Home Annunciators Smoke Control Panels Protective Covers Water Leak Detection A.R.A. Systems Mass Notification Specifications Contact Us Search Files This is alternative content. Online Store A s members of NFPA, AFAA, and SFPE, we are promoting standards of excellence in our industry. Light Engineered Displays supports training and certification programs such as NICET to insure that Life-Safety systems are properly designed and installed. We believe that the AHJ is an ally, not