City of Chicago Requirements The City of Chicago has specific codes regarding emergency egress signage. Signs must be rectangular 20-gauge sheet metal box with a glass or plastic face Signs must be red lettering on white The letters and arrows of the sign are MANDATED to be red All Exits Signs need to be internally illuminated with at least a 10 watt "electric lamp" City of Chicago Approved All LED Combo Exit Sign The CHCO series combo exit sign offers both modern and efficient design while still being compliant to Chicago City building codes. Ideal for local stores, office spaces, hospitals, movie theaters, schools, and more. UL924 Listed for damp locations and City of Chicago Operational Temperature 50°F to 104°F (2) Adjustable all LED head lamps 20-gauge steel housing with a white finish Product Dimensions Length: 10.9" Height: 16.10" Width: 3" Mounting Configuration The CHCO series combo exit sign comes with a steel mounting bracket that allows for side mount. Also includes universal knock-out patterns to mount to junction box. NiCad Battery No more heavy SLA batteries The CHCO combo exit sign comes equipped with a (2) 3.6V 2500mAh NiCad battery. (Battery must be connected upon installation) Universal Voltage Applications The CHCO is designed with a universal transformer that is suitable for 100-300VAC installation.