Systematic lamp replacement for energy efficiency improvement: a comparative luminous-efficacy analysis

Abstract

Achieving energy efficiency and establishing energy conservation for driving future energy is one of the prime concerns of any nation. Besides, the lighting system, one of the major contributors of energy consumption set ahead in fixing the aforesaid concerns to the extent possible. When looking at environmental benefits and energy saving opportunities, among several available luminaries, LEDs stand far superior to standard tubular fluorescent lamps (TFL). However, the power consumption pattern differs by its manufacturing constraints which are notified to the consumers through the star ratings and energy efficiency labels. Energy savings can be achieved by systematically replacing the conventional TFLs by means of energy efficient LED lamps (EEL). This paper focuses on the practicality of use concerning the scheme of lamp replacement to achieve better energy efficiency. To carry out these isometrics, Bureau of Energy Efficiency (BEE) approved TFL and LED lamps of different brands and star ratings were used. In line with methodology discussed in the manuscript, it is obvious that by replacing 36 W and 28 W standard TFLs through appropriate EELs, the respective annual energy savings of about 11-16 kWh and 7 kWh can be achieved. The results highlight that replacing the lamps randomly can be futile; however, a strategic process in the selection and proximate replacement ensures an optimal level of efficiency. This leads to an increased lumen output, longer lamp life, or both, which ultimately saves an appreciable amount of energy. The prospective research may focus on inter EEL replacement isometrics to achieve microtic energy efficiency.