Pay Back Analysis

Light HPSV LED
Power 150 55
Ballast/Chowk 30 5
Initial Light Cost 3500/- 7000/-
Unit Consume per Year 150+30x12x365/1000 55+5x12x365/1000
Total Unit Price 788 263
Total Unit x Total Price 788×7.5 263×7.5
Per Year Light Bill 5910 1972
Replacement if Default 250 0
Chowk/Ballast 750 0
Total Cost per Year 6910 1972
Saving Per Year 6910-1972=4938
Initial Investment 7000-3500=3500
Payback per year 3500/4938=0.708 Year
Month 0.708 x 12 month=8.5 month
Days Within 250 Days

 

Light HPSV LED
Power 250 90
Ballast/Chowk 35 5
Initial Light Cost 4160/- 18000/-
Unit Consume per Year 250+35x12x365/1000 90+5x12x365/1000
Total Unit Price 1248 416
Total Unit x Total Price 1248×7.5 416×7.5
Per Year Light Bill 9424 3120
Replacement if Default 400 0
Chowk/Ballast 500 0
Total Cost per Year 10324 3120
Saving Per Year 10324-3120=7204
Initial Investment 18000-4160=13840
Payback per year 4160/7204=0.577 Year
Month 0.577 x 12 month=6.9 month
Days Within  190  Days