Abstract

Lighting accounts for roughly one-fifth of global electricity consumption. The energy consumption for buildings lighting system can reach 30% of the total consumption. The demand for energy is growing day by day with growth in population, revolution in life style, and change in technology. This growing demand led to energy crisis which is the biggest warning for economic stability for developing countries like Pakistan. From the last ten years, Pakistan is facing severe electrical energy shortfall and thus the problem of balancing Pakistan's power supply and the demand has remained in a stalemate position. This crisis has badly affected the everyday life, business and industry. Despite taking steps like resolving this issue through initiating a number of power plant projects, the country still faces a significant energy shortfall. Hence, in order to reduce the gap between electricity demand and supply, the need for efficient usage of available electric energy through opting for the modern, highly energy efficient devices/systems cannot be undermined. A possible way to reduce the electricity consumption, and thus the energy bill, is related to the substitution of the old lamps and control of the new ones. Significant energy conservations can be achieved by reducing energy depletion by artificial lighting which has potential of energy saving by using efficient lighting technologies. For this purpose, new performance lamps like LEDs are studied and developed. Light Emitting Diodes (LEDs) have recently entered the lighting market as an energy efficient alternative to traditional light sources such as incandescent and fluorescent bulbs. A case study is carried out for a commercial setup to compare the enactment, suitability, sustainability and economic effects of conventional and LED lights in a commercial setup. An innovative lighting scheme has been designed by using DIALux simulation software based on international standards of Illuminating Engineering Society of North America (IESNA).The conventional lights on the shop floor has been substituted with LED lights as per software design. After hardware installation, it is revealed that by implementing this lighting scheme there is 47% of energy savings and user satisfaction with financial savings of Rs. 55570 per year, having 1.368 years payback period that validates use of LEDs as per proposed lightning design for wide-ranging lighting solicitations

Keywords: Light emitting diode (LED); Color rendering index (CRI); Compact fluorescent light (CFL)