|
Old fixture |
LED fixture |
| Initial cost |
Total of INR2.00
(INR0.20 each) |
Total of INR50.00
(INR5.00 each) |
| Wattage |
Total of 800 Watt
(80 Watt each) |
Total of 100 Watt
(10 Watt each) |
| Electricity cost (7 Rs/kWh) |
INR441.50 per year |
INR55.19 per year |
| Lifespan (continuous use) |
1,000 hours |
50,000 hours |
Lifespan when used for
12 hours a day, 7 days a week |
2 months 22 days |
11 years 4 months 30 days |
| No. of times an old fixture to be replaced each year |
Total of 43.80 times
(4.38 times each fixtures) |
- |
No. of times an old fixture to be replaced during the LED fixture's lifespan
(11 years 4 months 30 days) |
Total of 500 times
(50 times each fixtures) |
- |
Cost of replacements each year
([Incand. bulb cost] × [Number of replacement per year]) |
Total of INR8.76
(INR0.88 each fixtures) |
- |
Annual labor cost for ralamping
([Labor cost per relamping] × [Number of replacement per year]) |
INR0.00 per year |
- |
Total annual cost
([Cost of replacing fixtures] + [Electricity] + [Labor cost]) |
INR450.26 per year |
INR55.19 per year
(same as the annual electricity cost) |
Total cost
(after 11 years 4 months 30 days) |
INR5,142 |
INR680 |
Total savings /w LED fixture (ROI)
(after 11 years 4 months 30 days) |
INR5,142 − INR680 = INR4,462 |
Break-even point
(The amount of time necessary to save as much money as you invested initially) |
1 month 14 days |
