Design, construction and testing of multipurpose energy saving LEDs and its implications on energy crisis in Nigeria

Solar energy and other alternative energy sources thrive on devices that consume lesser power than that used with conventional power sources, besides; the increasing cost of energy generation has left every one searching for low power consumption devices. Focusing on a very essential electrical device used in every home and offices, this paper presents “the design and construction of multipurpose energy saving light emitting diode (LED) light”. Bright white LED with broadband spectrum wavelength were connected in series and parallel form on a reflecting but not conducting surface. A dual Power supply design mode was used such that either direct ac source of 220V or a 12V DC supply is compatible with it. The LEDs are however not directly powered by the supply voltage as they were energized through a low frequency pulse-width modulated circuit. This ensures longer life span for the LED as they are not constantly on, though not noticeable to the eye. At the same time pulse-width modulation is ensured, which automatically effects varying light intensity. This singular feature makes this device multipurpose energy saving LED lamp, as it is sufficiently useful in the bedroom, sitting room, outside lighting or even street lightning. The durability of this device is ensured as it has been subjected to more than twelve month test. The physics and the electrical properties of the LED were considered in the course of the design, hence device analysis, calculation, experimental and test results as well as the implication of this design on energy crisis in Nigeria are included in the body of this paper.