What does led light source mean? The advantages and disadvantages of LED light source are introduced.

Led light source is a common light source category in household lighting products. Many people are familiar with led light source products, but they can't explain what led light source means. Today, Bian Xiao will tell you this knowledge.

What does led light source mean?

Light emitting diode (LED) is a light source with high efficiency and long life. Light-emitting diodes were invented in the 1960s. In the next few decades, their basic use is as indicator lights for electronic devices such as tape recorders. It can be used continuously for 654.38+10,000 hours, which is 100 times longer than ordinary incandescent bulbs. LED light sources mainly include ring light source, strip light source, linear light source, backlight light source, external coaxial reflection light source, internal coaxial point light source, hemispherical ridge cover light source and so on.

What are the characteristics of led light source?

1, high luminous efficiency

After decades of technical improvement, the luminous efficiency of LED has been greatly improved. The luminous efficiency of incandescent lamps and tungsten halogen lamps is 12-24 lumens/watt, that of fluorescent lamps is 50-70 lumens/watt, and that of sodium lamps is 90- 140 lumens/watt, and most of the power consumption becomes heat loss. LED light effect

After improvement, it will reach 50 ~ 200 lumens/watt, with good monochromaticity and narrow spectrum, and can directly emit colored visible light without filtering. All countries in the world are stepping up the research on improving the light efficiency of LED, and its luminous efficiency will be greatly improved in the near future.

2. Low power consumption

The power of a single LED tube is 0.03 ~ 0.06W, which is driven by DC. The driving voltage of a single LED tube is 1.5 ~ 3.5V, and the current is 15 ~ 18mA, which has fast reaction speed and can work at high frequency. Under the same lighting effect, the power consumption is one tenth of that of incandescent bulbs and half of that of fluorescent tubes. Japan estimates that if you use LEDs with twice the light efficiency as fluorescent lamps to replace half of incandescent lamps and fluorescent lamps in Japan. It can save 6 billion liters of crude oil every year. Take the bridge guardrail lamp as an example, a fluorescent lamp with the same effect is more than 40 watts, while the power of each LED is only 8 watts, and it can change seven colors.

3, long service life

Using electron light field to radiate light, filament is easy to burn, thermal deposition, light attenuation and other shortcomings. LED lamps are small in size and light in weight, and are encapsulated by epoxy resin, which can withstand high-strength mechanical shock and vibration and is not easy to break. The average life span is 654.38+ million hours. The service life of LED lamps can reach 5 ~ 10 years, which can greatly reduce the maintenance cost of lamps and avoid the pain of frequent lamp replacement.

4. Strong security and reliability

Low calorific value, no thermal radiation, cold light source, safe touch: accurate control of light type and light emitting angle, soft light color, no glare; Does not contain mercury, sodium and other substances that may be harmful to health. The built-in microprocessor system can control the luminous intensity, adjust the luminous mode and realize the combination of light and art.

5. It is beneficial to environmental protection.

LED is an all-solid-state luminous body, which is shock-proof and impact-resistant, not easy to be broken, and the waste can be recycled without pollution. The light source is small in size, can be combined at will, is easy to develop into light, thin, short and small lighting products, and is also convenient for installation and maintenance. Of course, energy saving is the main reason why we consider using LED light sources. Perhaps the LED light source is more expensive than the traditional light source, but it takes one year to recover the investment of the light source, so as to obtain several times of the net income period of energy saving every year in 4 ~ 9 years.

What are the disadvantages of LED light source?

However, compared with other light sources, LED also has some disadvantages, such as low color rendering in white lighting. At present, the color rendering index of white LED produced by yellow phosphor and blue light is about 80. It can be used as general lighting, but it is not enough for some places that require high color resolution. Although the color rendering index can be improved to 90 or higher by adding appropriate red phosphor, there is still a certain gap compared with 99 of incandescent lamps, and its efficiency will be affected.