Hazardous location string lights illuminate areas where flammable, combustible, or ignitable materials are present. They keep arcs and sparks contained to reduce the risk of becoming a source of ignition for a fire or explosion. These hazloc string lights carry class and division ratings as defined by National Electrical Code (NEC) standards for use in areas with specific hazards. Class I and II lights also carry group ratings designating use in locations with specific types of gas, vapor, or dust. String lights set their light heads at intervals along a power cord, which loops onto overhead beams, joists, scaffolds, and pipe that can hold the weight of the lights. They are commonly daisy chained together to get the desired coverage. These industrial-grade lights withstand rugged work conditions and produce more light than accent-style string lights.