Edwards 89 Series Xenon strobe beacons are bright, up to 150 candela, low current visual signals suitable for indoor use only. Two mounting options are available; 89STR for flush mounting and the 89SMSTR for surface mounting on the supplied single gang surface box. The housing is made of gray, engineered thermoplastic. Ideal for use where a distinctive visual signal is required for timing, scheduling, paging, process control, general alarm and warning applications.