1 Million Candle Power Strobe Light. The SL-1 is a 1 million candlepower blue lens weatherproof strobe light that is designed to get immediate attention for emergency phones or residences when used in conjunction with the SC-911 Strobe Controller. A strobe light can get help to you when you need it most, providing the emergency services with a clearly visible beacon to locate you as fast as possible, and also alerting people nearby and medical personnel of your need for assistance. Applications Use with Viking's SC-911 to visually indicate the location of a 911 call Use with any switched 12VDC source to add instant attention grabbing visual indication to any Viking product Features Weatherproof design for outdoor use Wall mountable with screws (included) Flying lead connections for easy installation (wire nuts included).