What is the direct relationship between LED light efficiency and cost?
From the perspective of lighting cost, compared with fluorescent lamps, energy-saving lamps, incandescent bulbs and high-intensity discharge (HID), the unit cost of traditional light sources has no room to drop compared to LED lamps, and LED light sources are between 4,100~6,500K The cost estimate of the company can be from about 25 US dollars per thousand lumens in 2009, a significant drop of more than 90%, reaching the water level of 2 US dollars per thousand lumens.
At this stage, LED manufacturers in various countries are improving the comparison of light extraction efficiency. With high power, a chip size of 1 square millimeter, and an input current of 350 milliamperes, Cree, a major American manufacturer, currently has the most impressive results. The luminous efficiency of white LEDs has reached 186 lumens per watt. In the commercial product segment, the third quarter began to provide customers with a total luminous flux of 139 lumens and a luminous efficiency of 132 lumens per watt.
As for Nichia, Nichia announced that it has successfully developed a low-power white LED chip with the highest luminous flux in the industry. The white light LED released by Nichia has a luminous efficiency of 249 lumens per watt at a current of 20 mA, which is the highest in the industry. Nichia has always maintained a leading global position in the development of low-power LEDs. The company's luminous efficiency has reached 150 lumens per watt, and has now reached 249 lumens per watt.
For entering the indirect lighting or final main lighting market, in addition to the LED technology must be further improved, the price drop, the efficiency of lamps and the advantages of traditional light sources are all problems that LED lighting must face in the future.
Since the development of LED lighting, some manufacturers have introduced LEDs with luminous efficiency above 130 lumens per watt. If the current average luminaire efficiency is estimated to be 50~70%, the total efficiency of LED lighting fixtures is at least 65 lumens per watt. For accent lighting, or replacement of banned incandescent lamps, they are already qualified to enter the market.
Compared with other traditional light source technologies that have matured, LED luminous efficiency still has room for improvement. If we analyze the technology development of various manufacturers at this stage, only Cree can provide products with 132 lumens per watt. However, according to American Energy According to DOE, in 2015, the luminous efficiency of LED monomers has the opportunity to increase to 188 lumens per watt, and the warm light part also has the opportunity to reach 138 lumens per watt. If the overall lighting efficiency of the lamps is added, LED will become average by then Opportunities for lighting have been relatively improved.
Taking the US lighting market as an example, according to the general industry’s perception, new light sources have to enter the general lighting market at a cost of at least $5 per thousand lumens to be relatively competitive. Therefore, between 2012 and 2013, the cost of LED lighting Will be comparable to traditional light sources. If the luminous efficiency of LEDs is as estimated by the U.S. Energy Administration, by 2015, LEDs will only have $2 per thousand lumens left, and the chances of cutting into different lighting locations will inevitably increase.
According to the analysis of the Optoelectronics Association (PIDA), LED will play the role of local lighting or key lighting at this stage. It is estimated that LED will have the opportunity to cut into indirect lighting in 2013, but if LED TV can be accepted by the market in the past 1-2 years, Then the price of LED components will decline rapidly as the industrial economy scales up
