Brilliant red text when lit. Totally blacked out lens when not lit. No confusion deciding if the light is On or Off. AC units have AC-DC Converters inside each light and do not need power supplies. DC lights have a 2.5mm DC jack in the rear of the unit and come with a matching DC Plug. DC units do NOT include power supplies. FeaturesThree sided light for wide viewing angleBrilliant red lettering when litTotally blacked out lens when not litNo confusion deciding if the light is On or Off110VAC ConfigurationSolid Steel FrameMounts on standard single gang boxSpecificationsCase: 18 gauge steel, SilverFaceplate: 0.124 in./3mm thick red PlexiglasWidth: 3.2 in./81 mmDepth: 3.2 in./81 mmHeight: 4.9 in/124 mmPower: 115 VAC 1-7A7 110 VAC 7 watt bulbWeight: 2.4 lbs