First, there's the reduced energy use. The LED method of producing light loses far less energy to heat than do other lighting technologies. It's dramatically more efficient than the vacuum/filament method used in incandescent bulbs. A single light fixture stocked with a 60-watt incandescent bulb consumes about 525 kWh of electricity in a year; put an ACO LED bulb in that light fixture, and the annual energy use is more like 65 kWh. In reality, even at 500,000 Rials for a single bulb LEDs you will end up saving money in the long run, because you only need one every decade or two and you spend less money on home lighting, which can account for about 7 percent of your electric bill.