The SpectrAlert® Advance series strobes are ideal for warning hearing-impaired individuals during an emergency event. They have field selectable candela settings including 15, 15/75, 30, 75, 95, 110, and 115 candela. High candela models have field selectable settings that include 135, 150, 177, and 185 candela. They offers a plug-in design with minimal intrusion into the back box, making installations fast and fool proof while virtually eliminating costly and time-consuming ground faults.