Comparative experimental study on “useful life” of standard and commercially available AC and DC white PCLED bulbs under tropical condition

Abstract

The contemporary market is in demand of more power with expenditure of as less amount of energy as possible. Hence the scientists nowadays have shifted their concentration to design processes to meet this need. In this paper, the use of HP PC LEDs have been proved to be more efficient and environment friendly and have better scope of improvement in future than other lighting sources. The paper also focuses on the results of Quantitative Accelerated Lifetime Test and useful life estimation of LEDs making use of LM 80 and TM-21 has been done to facilitate the knowledge of users about the specifications of a particular company and comparison has been done to understand the trend of different companies. Thus this paper will facilitate the readers for making a choice of lighting source. This also opens the scope for further development of the LEDs by examining the reason of the degradation and finding the percentage contribution of each component element in the degradation to enhance its performance.