Abstract:
Among the different techniques available for demand side management, replacement of energy inefficient lamps with energy efficient lamps plays a major role.
Due to the huge market competition existing in between the competitors and as a consequence of some manufacturers prioritizing cost reductions over quality, present lighting market of Sri Lanka is flooded with low quality LEDs. At the same time, unlike the star rating system for CFLs, at present there is no proper guideline for the consumers to be used in their buying decision. Hence, this research was intended in developing a Minimum Energy Performance Standard for direct replacement type LEDs sold in Sri Lankan Market.
The market prices of LED lamps required for this study were obtained from a market survey by visiting a few vendors. Coincidence factor required for the cost-benefit analysis was derived based on a theoretical calculation using the available data from sources like SLSEA, CEB, and PUCSL & ADB Household survey on lighting.
Sensitivity analysis carried out during this study show how the minimum efficacy bar varies with the market prices under different coincidence factors. However, it is suggested to perform a small sample survey to verify the accuracy of the coincidence factor taken.
Major Findings of this research include justification to values of technical parameters such as efficacy and power factor of an LED lamp decided in initiating Minimum Energy Performance Standard by the relevant authorities responsible and the payback period of such a national level replacement project. This study also reveals the cost incurred by an individual consumer per light output (in Lumens) when the inefficient lamps like incandescent bulbs of his household are replaced with LED lamps.
