[Source: "High - tech LED - Research and Review" December issue GLII]
In recent years, with the advancement of technology, white LEDs have gradually been applied in the field of general lighting, replacing traditional incandescent lamps, fluorescent lamps, energy-saving lamps, some of which have been applied to shopping malls, supermarkets, office buildings, hotels, factories and other industries. Commercial areas.
However, the overall LED lighting penetration rate is still relatively low, and the high price is the main factor that hinders LEDs from replacing traditional lighting. This article will analyze the driving force of the LED indoor lighting market and the prospects of the future market from the perspective of cost of use.
Lighting cost analysis
In 2007, Sandia National Laboratories divided the cost of light source into investment cost and operating cost. GLII draws on its ideas and combines the actual situation of domestic electricity bills and prices to make the following analysis.
The cost of lighting consists of the purchase cost of light source and the cost of electricity. The cost per hour of illumination per hour is the amortization of the cost of the light source over its useful life plus the cost per hour of electricity. Its calculation formula is as follows:
C=1000*Ps/(L*E*P)+Pe /E
In the formula:
Ps: the price of the light source, in units of yuan;
L: life of the light source, the unit is hour;
E: luminous efficiency of the light source, the unit is lm/W;
P: source power, unit is W;
Pe: electricity price, the unit is yuan / KWH;
Taking into account the accuracy of the cost comparison of incandescent lamps, fluorescent lamps and LED lamps, the survey mainly selected products with high brand awareness and stable prices in the market as samples. Among them, incandescent lamps, fluorescent lamps choose Philips, Osram, NVC, Foshan lighting, LED lights choose Philips, Sanxiong Aurora, Foshan lighting and LED listed companies Changfang lighting, Qinshang optoelectronic products as a reference, all kinds of products take 20-30 The sample counts its price and power.
According to national standards, the life expectancy of incandescent lamps is more than 1000 hours, the life of fluorescent lamps is more than 6000 hours, and the life of LEDs is more than 25,000 hours. The calculation of this paper will use the national minimum standard as the service life of the light source. Light source luminous efficiency data processing, incandescent lighting effect is 10-20lm / w, take 15lm / W for estimation; fluorescent lighting effect is 50-100lm / W, take 70lm / W for estimation; LED lighting effect is 70-110lm / w Take 90lm/w for estimation. In terms of electricity prices, according to the “Notice on the Implementation and Settlement of Electricity Prices in 2010â€, the average electricity price for civilian use is 0.57 yuan per kWh, and the average price for commercial electricity is 0.81 yuan per kWh.
Further assume that the price of incandescent lamps, fluorescent lamps, and luminous efficiency will not change in the next few years. According to Haitz's law, LED lighting products have an average annual price drop of 20% and a power drop of 20% with the same luminous effect. The electricity price is estimated at 0.57 yuan and the following results are obtained.![]()
As can be seen from the above table, regardless of incandescent lamps, fluorescent lamps or LED lamps, the cost of electricity accounts for more than 60% of the total cost. Since LED lamps have very high luminous efficiency and low energy consumption, in the long run, LED lamps are used. The overall cost of lighting is the lowest, only 0.0096 yuan in 2012, less than 1/4 of incandescent lamps.
With the improvement of LED light efficiency and the reduction of price, the overall cost of LED lighting will be more prominent. By 2015, its comprehensive cost is only 0.0049 yuan, about 1/10 of the cost of incandescent lighting, and the cost of fluorescent lighting is not Halfway through.
Compared with the prediction made by the San Diego laboratory in 2012, because the US economic environment, electricity price, light source price and quality are different from those in China, the parameters chosen are different, and the data obtained are different, but the conclusions are similar. The integrated lighting cost of LEDs is the lowest and is in a period of rapid decline.![]()
In recent years, with the advancement of technology, white LEDs have gradually been applied in the field of general lighting, replacing traditional incandescent lamps, fluorescent lamps, energy-saving lamps, some of which have been applied to shopping malls, supermarkets, office buildings, hotels, factories and other industries. Commercial areas.
However, the overall LED lighting penetration rate is still relatively low, and the high price is the main factor that hinders LEDs from replacing traditional lighting. This article will analyze the driving force of the LED indoor lighting market and the prospects of the future market from the perspective of cost of use.
Lighting cost analysis
In 2007, Sandia National Laboratories divided the cost of light source into investment cost and operating cost. GLII draws on its ideas and combines the actual situation of domestic electricity bills and prices to make the following analysis.
The cost of lighting consists of the purchase cost of light source and the cost of electricity. The cost per hour of illumination per hour is the amortization of the cost of the light source over its useful life plus the cost per hour of electricity. Its calculation formula is as follows:
C=1000*Ps/(L*E*P)+Pe /E
In the formula:
Ps: the price of the light source, in units of yuan;
L: life of the light source, the unit is hour;
E: luminous efficiency of the light source, the unit is lm/W;
P: source power, unit is W;
Pe: electricity price, the unit is yuan / KWH;
Taking into account the accuracy of the cost comparison of incandescent lamps, fluorescent lamps and LED lamps, the survey mainly selected products with high brand awareness and stable prices in the market as samples. Among them, incandescent lamps, fluorescent lamps choose Philips, Osram, NVC, Foshan lighting, LED lights choose Philips, Sanxiong Aurora, Foshan lighting and LED listed companies Changfang lighting, Qinshang optoelectronic products as a reference, all kinds of products take 20-30 The sample counts its price and power.
According to national standards, the life expectancy of incandescent lamps is more than 1000 hours, the life of fluorescent lamps is more than 6000 hours, and the life of LEDs is more than 25,000 hours. The calculation of this paper will use the national minimum standard as the service life of the light source. Light source luminous efficiency data processing, incandescent lighting effect is 10-20lm / w, take 15lm / W for estimation; fluorescent lighting effect is 50-100lm / W, take 70lm / W for estimation; LED lighting effect is 70-110lm / w Take 90lm/w for estimation. In terms of electricity prices, according to the “Notice on the Implementation and Settlement of Electricity Prices in 2010â€, the average electricity price for civilian use is 0.57 yuan per kWh, and the average price for commercial electricity is 0.81 yuan per kWh.
Further assume that the price of incandescent lamps, fluorescent lamps, and luminous efficiency will not change in the next few years. According to Haitz's law, LED lighting products have an average annual price drop of 20% and a power drop of 20% with the same luminous effect. The electricity price is estimated at 0.57 yuan and the following results are obtained.
As can be seen from the above table, regardless of incandescent lamps, fluorescent lamps or LED lamps, the cost of electricity accounts for more than 60% of the total cost. Since LED lamps have very high luminous efficiency and low energy consumption, in the long run, LED lamps are used. The overall cost of lighting is the lowest, only 0.0096 yuan in 2012, less than 1/4 of incandescent lamps.
With the improvement of LED light efficiency and the reduction of price, the overall cost of LED lighting will be more prominent. By 2015, its comprehensive cost is only 0.0049 yuan, about 1/10 of the cost of incandescent lighting, and the cost of fluorescent lighting is not Halfway through.
Compared with the prediction made by the San Diego laboratory in 2012, because the US economic environment, electricity price, light source price and quality are different from those in China, the parameters chosen are different, and the data obtained are different, but the conclusions are similar. The integrated lighting cost of LEDs is the lowest and is in a period of rapid decline.
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