Safe high-intensity illumination for sight glasses, ports, or general applications in hazardous (classified) locations. For specific-area illumination or the illumination of sight ports or Visual Flow Indicators, the Lumiglas Model USL08-Ex lights are UL approved for Class 1, Division 1 and 2, Groups C and D applications. These sturdy, compact lights are now available in 35-watt, 50-watt or 100-watt versions. On sight ports 6" and larger, the USL08-Ex Luminaire provides combination illumination and glare-free viewing. View the circular sight glass fitting weld-on styles Series DIN28120 or ANSI flange bolt-on types to find a configuration to suit your needs.