LED lighting research and development oriented to brightness

Industry forecast 2025 LED light efficiency will reach 200lm/W, the annual energy consumption will save $35 billion. But so far (2008) practical white light LED lamp group can only reach 50lm/W. The development of Photovoltaic Industry Association of North America (OIDA) was also optimistic estimates, in 2007 the white LED luminous efficiency can reach 75lm/W, 2012 to 150lm/W stage, and because of the rapid decline in prices, the estimated 2007 can replace incandescent tungsten light bulbs, but can see the places of high color temperature white light LED is not suitable for the lighting environment exquisite atmosphere such as restaurants, hotel and residential mainly to leisure. In countries with high latitude and low temperatures in winter, low temperature light sources are often used to operate a warm lighting environment.

Unless the policy is mandatory, otherwise still has its value of incandescent lamp, incandescent lamp to eliminate environmental pollution should have a strong reason to such outside; at the same time LED itself also has some serious shortcomings, first of all, the LED package into a narrow angle of light distribution is not conducive to the light distribution of large area; secondly, LED process and defect early damage to form the light distribution module is not uniform; also, the replacement of single LED inconvenience, product stability and efficiency need to continue efforts to improve, and the fluorescent lamp in 2005 time efficiency has reached 120lm/W, and the utility of the solid amalgam, recycling waste tube has less pollution to the environment problems. So it's not easy for LED to completely replace the fluorescent tube.

LED lamp application has its limitations, it can only be said to have its market, but it is difficult to fully replace all the bright light source. So the announcement of the future LED will replace all of the assessment of light sources, most of them are suspected of violating the market economy, is not conducive to the right of the LED industry, and is a waste of money to mislead people in the research and development on the wrong.

Light: with a plurality of LED modules or high strength LED (high power HBLED) to enhance the light output, showed low illumination and high brightness optical properties, so as to be on the car headlights, to produce 100000cd/m2 glare brightness, serious harm to the driver eye vision. Indoor lighting: as of 2008 White LED lamp, desktop distance of about 30-45 cm, minimum radiation range of 40 * 40cm2 to produce 500Lux, the market price is about 5-8 times 1000Lux energy-saving lamp lamp, illumination should be more than 10 times, light and serious uneven light distribution, only as a long time reading difficulties the application is limited, while the LED into the indoor lighting as cast down light or headlight, the light emitting price must fall to the cost of LED is much lower than the cost of fluorescent lamps, so LED indoor lighting to enter indoor lighting applications have a long way to go.

Although the global attention has been paid to the development and application of street lamps, but the lack of an objective and correct assessment, wishful thinking. In the marketing of LED in long life spread competitiveness disadvantage, but the cost and price is still higher than the general light source is more than 10 times, so the LED lighting research and development advantages and need to move in the right direction, it is more important to a more pragmatic assessment.

Source: LEDinside