High-power LED lighting application
The author：admin Update time：2009-8-25
Urban landscape through the night over high-power LED lighting and LED colors suitable design to allow the night as beautiful as fairyland fantasy. Urban Night lighting project including the general basis for functional lighting, such as, street lighting, building decoration, advertising and exhibition, but the real magic to the city Meilun America is advertising lighting design, the use of different high-power LED light source means blend of lighting design to the city at night it is particularly magnificent, emitting a beautiful and bustling modern cities.
Night lighting in urban design and planning of advertising, the often extensive use of high-power type of high-power LED lights, because the high-power LED light source emitting light beads can be any combination of color change control and so in order to give designers an unlimited imagination and design space. High-power LED Another key characteristic is energy saving and long life. As long as the LED driving voltage 3.6V, power consumption is very low, only 20% of white Sunburn power light volume, but power is up to 50,000 hours service life, high power LED lighting device that is small in size, power consumption , color saturation and no UV light, high-power lamps during the day because of small size will not affect the overall effect of the building exterior, buildings and sky at night will not cause sun damage.
LED light life up to 500 million hours, but now many of the works can not be this good, but to the user to see the light serious decline, and short life, not less than 10,000 hours and it broke. This is because we are using the LED is the most commonly used in electronics industry indicator of Ф3mm ~ Ф5mmLED, using simple electronic circuit to increase current to increase the intensity, but the LED only get a brief high-intensity, but lost LED should be life. Real applications to LED illumination, LED's own quality and control circuits are very important. Therefore, we carefully choose LED, do not use Ф3mm ~ Ф5mmLED as a lighting source.
LED lights have a good bead does not work, power driver circuit board design and light is also important. Develop a series of these LED constant voltage, constant current control electronic circuit, integrated circuit technology using high-tech LED each and the input current control in the best current value, so can stabilize the LED current, and produce the highest luminous flux output, while LED life of 50,000 hours can be achieved still has 70% of the light output.
To green 5mmLED example:
(1) the time when the voltage of 3.5V, LED current at 20mA, in the normal scope of work;
(2) the time when the voltage of 3.8V, LED's current 50mA, has exceeded the normal standard LED, life and light of its failure will be substantially reduced;
(3) the time when the voltage of 4.2V, LED on the current 110mA, LED will be quickly damaged.
Heat on high power LED but very important, it directly affects the light output and LED life, a good LED lamp beads also accompanied by application of thermal plastic material. Glue LED products after the heat better and better water features, even if placed in water will not short circuit. If any electrical water, can cause short circuits and damage to electrical appliances. LED is also true, if the LED's positive and negative water, water lines or drive LED will soon affect the life of LED.
Single set of initial investment cost of LED lamps is about the traditional lighting of 4 to 5 times, but the LED light source, long life and low power consumption, so the running costs after 5000 hours lamp with a comparison of the initial investment costs, can clearly see the traditional LED lamps cost more than lamps, lamps 5000 hours, 6 hours per day lighting design, about 2 years time you can recover their investment. Then according to Table 2 that the overall costs can be compared.
