Number of existing light to be replaced to LED: Light
Existing  LED  
Initial Light cost  Rs  Rs 
Wattage  watt  watt 
Electricity cost ( Rs/kWh)  Rs per year  Rs per year 
Life span (continuous use)  hours  hours 
Life span when used for hours a day, days a week 
days  days 
Number of Times a traditional light to be replaced each year  Total of times (4.38 times each fixtures) 

Number of Times a traditional light to be replaced during the LED lights’ life span (after ) 
Total of times (80 times each fixtures) 

Cost of light replacements each year ([Incand. light cost] × [Number of replacement per year]) 
Total of (4.38 each fixtures) 

Annual labor cost of incand. bulb replacement ([Labor cost per incand. bulb] × [Number of replacement per year]) 

Total annual cost ([Cost of light replacement] + [Electricity] + [Labor cost]) 
Rs per year 
Rs per year (same as the annual electricity cost) 
Total cost (after ) 

Total savings with LED light (after ) 

Breakeven point (The amount of time necessary to save as much money as you invested initially) 