Abstract: A security lighting system is provided for convenient mounting to a standard electrical junction box. The security light fixture includes a housing, a cantilevered arm extending from the housing, and a back plate on an end of the cantilevered arm. The back plate has a reinforced attachment structure capable of supporting the bending moment of the heavy, cantilevered light structure. The attachment structure may include, for example, a reinforced cone. The back plate and cantilevered arm may be integrally formed for convenient manufacturing and added structural strength. The fixture may include a cross bar for attaching to the junction box, with the cross bar serving to interconnect the junction box with the back plate. In one embodiment, the security lighting system provides an option of electrically interconnecting the system to a standard j-box or, alternatively, to an electrical conduit, as desired.

Abstract: A time-controlled security lighting system records the length of nighttime and is capable of automatically adjusting for seasonal nighttime hours. The time duration between the initial nighttime darkness and the light of dawn, as sensed from the prior day by a photocell, is measured and recorded in memory. As the surrounding area becomes dark, the lighting system is activated to provide the illumination for the area. The duration of illumination is determined based on a predetermined fraction of the recorded length of nighttime from the previous night. The control system can adjust the duration of illumination according the recorded nighttime durations from the previous night. The control system can also adjust the level of illumination based on the signals from a motion detector, where the lights are set at a higher brightness for a predetermined amount of time upon detection of motion.