Does not contain mercury, lead and other heavy metals that pollute the environment, emit ultraviolet light, so LED lighting will not have a lot of mosquitoes around the light source like traditional lamps to make the environment more clean and tidy; The innovative design of metal shell constant current drive makes the conversion of electrical energy into light very efficient.
Unique advantage
(1) Energy saving: The spectrum of LED is almost all concentrated in the visible light band, and its luminous efficiency can reach 80-90%. The author also compares LED lamps with ordinary incandescent lamps, spiral energy-saving lamps and T5 three-color fluorescent lamps, and the results show that: The light efficiency of ordinary incandescent lamp is 12lm/w, the life is less than 2000 hours, the light efficiency of spiral energy-saving lamp is 60lm/w, the life is less than 8000 hours, T5 fluorescent lamp is 96Alm/w, the life is about 10000 hours, and the diameter of 5 mm white LED is 20-28lm /w, the life can be greater than 100000 hours. Some people also predict that the future LED life limit will be infinite.
It is generally believed that energy-saving lamps can save energy by 4/5 is a great innovation, but LED is more energy saving than energy-saving lamps by 1/4, which is a greater reform of solid light source. In addition, LED also has other advantages, high light quality, basically no radiation, is a typical green lighting source; Reliable and durable, extremely low maintenance costs and so on. Because LED has the above characteristics of other solid light sources can not be matched, 10 years later LED will be the mainstream light source in the lighting industry.
(2) Safety and environmental protection: LED working voltage low, mostly 1.4-3V; The working current of ordinary LED is only 10mA, and the ultra-high brightness is only 1A. LED in the production process do not add "mercury", do not need to inflate, do not need glass shell, good impact resistance, good shock resistance, easy to break, easy to transport, very environmentally friendly, known as "green energy".
(3) Long service life: The LED is small, light weight, and the shell is an epoxy resin package, which can not only protect the internal chip, but also has the ability to transmit light and gather light. The service life of LED is generally between 50,000 and 100,000 hours, because LED is a semiconductor device, even if it is frequently switched, it will not affect the service life. At present, the main use of household lighting is incandescent lamps, fluorescent lamps and energy-saving fluorescent lamps.
(4) Fast response speed: The response frequency of LED fτ is related to the life of the injection of a few carrier τmc, such as the LED made of GaAs material, its τmc is generally in the range of 1-10ns, then the response frequency is about 16-160mhz, such a high response frequency is enough for the display of 6.5MHz video signal. This is also one of the key factors to achieve a large video LED screen.
The lowest LED response time has reached 1 microsecond, and the general response time is several milliseconds, which is about 1/100 of the ordinary light source response time. Therefore, it can be used in many high-frequency environments, such as automotive brake lights or status lights, which can shorten the braking time of the vehicle behind the car, thereby improving safety.
(5) High luminous efficiency: incandescent lamp, halogen tungsten lamp light efficiency is 12-24lm/w(lumen/watt), fluorescent lamp light efficiency is 50-70lm /w, sodium lamp light efficiency is 90-140lm /w, most of the power consumption into heat loss. The light efficiency of LED can reach 50-200lm /w after modification, and the monochromaticity of light is good, the spectrum is narrow, and the colored visible light can be directly emitted without filtering.
(6) The size of the LED component is small: it is more convenient for the layout and design of various equipment, and it can better achieve the effect of "only seeing the light and not seeing the light source" in the night scene lighting.
(7)LED light energy concentration is high: concentrated in a small wavelength window, high purity.
(8)LED luminous directivity: brightness attenuation is much lower than traditional light sources.
(9)LED low voltage direct current can be driven: has the advantages of small load, weak interference, low requirements for the use of the environment.
(10) Can better control the composition of the luminous spectrum: it can be well used for local or key lighting in museums and exhibition halls.
(11) The size of the semiconductor light-emitting layer and the forbidden band of the semiconductor material can be controlled: thus emitting a variety of colors of light, and the chrominance is higher.
(12) High color rendering: it will not cause harm to people's eyes.