Number of incandescent bulbs to be replaced to LED bulbs:
|
| |
Incand. bulb |
LED bulb |
| Initial bulb cost |
|
|
| Wattage |
|
|
| Electricity cost () |
|
|
| Life span (continuous use) |
|
|
Life span when used for
|
|
|
| Number of times an incandescent bulb to be replaced each year |
|
- |
Number of times an incandescent bulb to be replaced during the LED bulb's life span
() |
|
- |
Cost of bulb replacements each year
([Incand. bulb cost] × [Number of replacement per year]) |
|
- |
Annual labor cost of incand. bulb replacement
([Labor cost per incand. bulb] × [Number of replacement per year]) |
|
- |
Total annual cost
([Cost of bulb replacement] + [Electricity] + [Labor cost]) |
|
(same as the annual electricity cost) |
Total cost
(after ) |
|
|
Total savings with LED bulb
(after ) |
|
Break-even point
(The amount of time necessary to save as much money as you invested initially) |
|
