than incandescent light bulbs regardless of their cheap price. Incandescent light bulbs create light by heating a filament inside the bulb; the heat makes the filament white-hot, producing the light that you see. Because of the heating process, 90% of the energy used is wasted for generating heat.
On the other hand, while CFL can be used for 8 to 10 years, LED can be used for 40 to 50 years with a low electricity consumption. LED can be relatively expensive compared to other kinds of light bulbs. Because it consumes less, environmentally friendly and doesn’t contain lead and mercury
|
|
LED |
CFL (өдрийн гэрэл) |
Шар чийдэн |
| Light bulb projected lifespan |
50,000 цаг |
10,000 цаг |
1,200 цаг |
| Watts per bulb (equivalent to 60WT) |
10 |
14 |
60 |
| Cost per bulb |
50,000 ₮ |
8,000 ₮ |
1,500 ₮ |
| KWh of electricity used over 50,000 hours (1кВт=1000Вт) |
500 кВт |
700 кВт |
300 кВт |
| Cost of electricity ( household tariff 1кВт-94.10₮) |
47,050 ₮ |
65,870 ₮ |
282,300 ₮ |
| Cost of electricity ( office tariff 1кВт-151.60₮) |
75,800 ₮ |
106,120 ₮ |
454,800 ₮ |
| Bulbs needed for 50,000 hours of use |
1 |
5 |
42 |
| Equivalent 50,000 hours bulb expense |
50,000 ₮ |
40,000 ₮ |
63,000 ₮ |
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