The IRONguard™ Sure-Lite interior traffic lights provide a low-cost alternative to maintain communication between truck drivers and loading dock attendants. The red and green LED lights are instantly understood as Stop and Go, providing clear signals to drivers and attendants. Service- and maintenance free—no need to replace bulbs or lenses. Lights won't rust, pit, or corrode. Operating and storage temperature: -40°C to 85°C. Completely embedded wiring on the back of the panel make the lights moisture-, water-, and weather-resistant. Each light fixture includes a 15-ft. long wiring cable for 12/24VDC. Pre-drilled mounting holes provide easy installation. 1/2"-thick HDP (high-density polyethylene) low-profile design eliminates impact damage.