Comparative approximate calculation of the payback period of office lightings based on LEDs and fluorescent lamps
LED lighting LED-EL-01, an analogue of recessed fluorescent lamp for illumination of public buildings 4x18, 595h595 (consumption 28W)
Number of years |
count (pcs.) |
yearly consumption(24 hours/ day),kW |
price for 1 kW, UAH. (yearly +10% ) |
consumption bill, UAH |
price of a lighting+ bulbs UAH |
cost of bulbs replacement |
LED-EL-01 |
1 |
1,00 |
245,28 |
1,05 |
257,54 |
1866,00 |
- |
2123,54 |
2 |
1,00 |
245,28 |
1,16 |
283,30 |
- |
- |
2406,84 |
3 |
1,00 |
245,28 |
1,27 |
311,63 |
- |
- |
2718,47 |
4 |
1,00 |
245,28 |
1,40 |
342,79 |
- |
- |
3061,26 |
5 |
1,00 |
245,28 |
1,54 |
377,07 |
- |
- |
3438,33 |
6 |
1,00 |
245,28 |
1,69 |
414,78 |
- |
- |
3853,11 |
7 |
1,00 |
245,28 |
1,86 |
456,25 |
- |
- |
4309,36 |
8 |
1,00 |
245,28 |
2,05 |
501,88 |
- |
- |
4811,24 |
9 |
1,00 |
245,28 |
2,25 |
552,07 |
- |
- |
5363,31 |
10 |
1,00 |
245,28 |
2,48 |
607,28 |
- |
- |
5970,59 |
Fluorescent lighting of raster type recessed fluorescent lamp for illumination of public buildings 4x18, 595h595 (consumption 85,4W)
Number of years |
count (pcs.) |
yearly consumption(24 hours/ day),kW |
price for 1 kW, UAH. (yearly +10% ) |
consumption bill, UAH |
price of a lighting+ bulbs UAH |
cost of bulbs replacement |
ЛЛ 4х18 |
1 |
1,00 |
748,11 |
1,05 |
785,52 |
280,00 |
|
1065,52 |
2 |
1,00 |
748,11 |
1,16 |
864,07 |
|
|
1 929,58 |
3 |
1,00 |
748,11 |
1,27 |
950,47 |
80,00 |
|
2960,06 |
4 |
1,00 |
748,11 |
1,40 |
1 045,52 |
|
|
4005,58 |
5 |
1,00 |
748,11 |
1,54 |
1 150,07 |
80,00 |
|
5235,65 |
6 |
1,00 |
748,11 |
1,69 |
1 265,08 |
|
|
6500,73 |
7 |
1,00 |
748,11 |
1,86 |
1 391,59 |
80,00 |
|
7972,32 |
8 |
1,00 |
748,11 |
2,05 |
1 530,75 |
|
|
9503,07 |
9 |
1,00 |
748,11 |
2,25 |
1 683,82 |
80,00 |
|
11266,89 |
10 |
1,00 |
748,11 |
2,48 |
1 852,20 |
|
|
13119,09 |
This simplified calculation shows that the payback period of the LED lighting LED-EL-01 compared to the same lamp-based FL (fluorescent lamps) is up to up to 2.5 years. The calculation does not take into account the average cost of the f lamp replacement, it also does not considered the possibility of using a smaller cross-section of the cable and therefore cost of savings.