Journal of Electrical Systems and Information Technology

Table 8 Overall investment and saving on lighting fixtures

From: Retrofitting existing buildings to reduce electrical energy consumption and greenhouse gas emission in Nigerian food and beverage industries

	Industry A	Industry B	Industry C
Total investment cost ($)	17,511.9	20,278.5	15,994
Total installation cost ($)	890	1000	800
Total energy savings (kW h/yr)	133,680	161,160	120,474
Total potential savings ($/yr)	19,249.92	23,207.04	17,348.26
Total payback time (Month)	12	11	12

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