A novel smart solar-powered light emitting diode (LED) outdoor lighting system is\ndesigned, built, and tested. A newly designed controller, that continuously monitors the energy\nstatus in the battery and, accordingly, controls the level of illumination of the LED light to satisfy the\nlighting requirements and/or to keep the light â??onâ? the longest time possible, has been developed.\nThe use of such a reliable solar energy-driven lighting system, with maximum time when the light\nis â??onâ?, will eliminate the sudden-death of light problem present in conventional photovoltaic (PV)\noutdoor lights and, therefore, will enhance the natural surveillance and feeling of safety in sustainable\nbuildings and cities. Furthermore, the new smart control eliminates the overdischarge of the system\nbattery and, thus, ensures a longer lifetime of the system battery. Experimental measurements on a\nsystem using a 30WLED light showed that the operating hours of the new system reached 29.16 h\n(1750 min), while the operating hours for a similar conventional system were 20.86 h (1252 min).\nThus, the new lighting system was demonstrated, securing more than 40% of operating hours than\nthe conventional systems.
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