The Street Light Sentinel (SLS) is designed as a utility grade basic function smart photocell and Luminaire controller. The SLS comes standard with a pre-loaded energy harvesting management profile (dimming) that optimizes lumen production with the ambient light during dusk and dawn. Ready to work out of the box, the SLS plugs into the standard ANSI 136.41 7-pin NEMA receptacle and automatically interacts with the 0-10V dimming drivers of the Luminaire. The SLS incorporates multiple protocol options to provide outage and defective operation notification.