• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.26 no.1
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• pp.8-14
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• 2012

An economic evaluation is required to reduce the cost of energy and lighting in the design of interior lighting. WEELS2011 is developed as a method of economic evaluation for LED lighting systems. Economic evaluation for fluorescent and LED lightings and after applying rebate to LED system is conducted using WEELS2011. The utilization and analysis of WEELS2011 are suggested for the reduction of energy and lighting cost.

• The Journal of the Korea Contents Association
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• v.15 no.6
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• pp.43-53
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• 2015

This study analyzes economic feasibility of the LED lighting system compare to the halogen. To evaluate economic feasibility of the LED devices, we analyzed the size of theater, current value of the lighting devices in kinds, annual cost and annual cost according to the surface in case of designing stage lighting system with LED using WEELS 2011. Also, to compare energy consumption, we analyzed consumption and amount of electric energy by the surface and the amount of CO2 emission. Data showed that annual cost of the LED devices are highly inexpensive than halogen and now the value is of great. However initial cost of the equipment 200% higher than halogen. Though LED devices are expensive in startup setting, the value of utilization factor is large and depreciation years of LED(30years) are longer than halogen(2years). Therefore, annual cost of LED can make up the minus. Consider the tendency of reducing price of LED devices, we can assume that annual cost of the LED will be lower than halogen devices. Further, in 3years the expense of LED and halogen is reversed.