Economic analysis on renovating lighting system on existing building: A case study in Thailand

This paper proposed economic analysis on implementation of energy efficiency improvement measure in lighting system of existing building. The study used education purposed building in Thailand as case study building. Two important economic parameters, discounted payback period and internal return rate (IRR), will be used to determine the feasibility to invest in the proposed measured. The result has shown the possibility to investing in renovate lighting system in existing with better energy saving and attractive economical parameter. This methodology and result from case study building can be used to design the suitable subsidy policy for energy efficiency improvement by renovate existing building in the future.