of main power or additionally by sensing the level of ambient light and turning on the leds only when the ambient light is low enough to indicate that the primary light 26 is inactive this would provide illumination at times when the main light 26 should be engaged but is not for example upon burnout of the main light bulb while exterior applications of the lighting system are described above further applications are envisioned both exterior and interior the present invention is suitable for use anywhere an auxiliary lighting system is necessary because of its use of lower energy using leds and stored solar power the system is extremely economical compared to known auxiliary or emergency lighting systems for example referring to fig6 auxiliary lighting system 20 is shown advantageously being used to light the interior of a building 28 photoelectric collector 12 is shown mounted to the roof 30 of the building 28 alternately photoelectric collector 12 could be mounted in the interior of the building 28 anyplace where it would receive sufficient sunlight during daylight hours such as near a window 32 the photoelectric collector 12 is electrically connected to an energy storage device 16 such as battery 34 battery 34 can be mounted at any convenient location in the building 28 the energy storage device 16 is then electrically connected to the energy sensor 14 the energy sensor is also connected to a primary power source 22 finally the energy sensor 14 provides an electrical connection to the leds 18 one such led 18 being.