Comparative Studies on Performance of Commercially Available High-Power PC-LED Bulbs Under Tropical Conditions

As addressed by scientists, industrialists, and policymakers from all over the globe at the 2015 United Nations Climate Change Conference, held in Paris, France, it is a very important problem to reduce the greenhouse gas effect to limit the global temperature increase to 2 °C above pre-industrial levels. The main objectives of the conference are to reduce world pollution as well as reduce climate change in the pact, by all the nations of the world. It can be possible only by introducing eco-friendly energy solutions to achieve the goal. Light-emitting diodes play a crucial role to fulfill all the objectives. In addition to energy efficiency of LEDs, there are substantial benefits over CFL and other conventional light sources. White power LEDs show a very acceptance light level which implements some promise by saving a considerable amount of energy in indoor as well as outdoor light applications. However, the “useful life” is the most important parameter in the field of device fabrication. If the proper device is not chosen, the preferred reliability and performance will not be obtained. In this paper, two different varieties of high-power white LED with AC drivers, are put to test the “useful life” as per IESNA LN-79 Standard. In this working prototype, “useful life” of high-power LEDs as well as their thermal behavior have been studied for 6,000 h, lumen depreciation characteristics is plotted and extrapolated the data up to 50000 h. From the results obtained, the proper LED is chosen for further applications.