(1) energy saving: LED's spectrum is almost entirely concentrated in the visible spectrum, and its luminous efficiency can reach 80-90%. The author will also LED to ordinary incandescent lamp, spiral energy-saving lamps T5 trichromatic fluorescent lamps and done a match, the result show: the ordinary incandescent light efficiency of 12 lm/w, life is less than 2000 hours, spiral energy-saving lamp luminous efficacy of 60 lm/w, life is less than 8000 hours, T5 fluorescent lamp is 96 alm/w, life is about 10000 hours, and a diameter of 5 mm white LED to 20-28 lm/w, life can be greater than 100000 hours. Some predict that future LED life will be unlimited.
The average person thinks that the energy saving of energy-saving lamps is a huge innovation, but LED is more energy saving than energy-saving lamps by 1/4, which is a bigger change of solid light sources. In addition, LED has other advantages, such as high light quality and no radiation at all. It is a typical green lighting source. Strong durability, extremely low maintenance and so on. Because leds have properties that no other solid source can match, they will be the dominant light source in the lighting industry in 10 years' time.
(2) safe and environment-friendly: the working power of LED is low, mostly 1.4-3v; The working current of ordinary LED is only 10mA, and the super bright LED is only 1A. Leds do not add "mercury" in the process of consumption, inflatable don't demand, not demand glass shell, good impact resistance, good shock resistance, invulnerability to breakage and facilitate transportation, environmentally friendly, known as "green energy".
(3) long service life: the LED is small in size and light in weight, and the shell is epoxy resin encapsulated. It can not only maintain the internal chip, but also has the ability of light transmission and concentration. LED service life is generally between 50,000 and 100,000 hours. As LED is a semiconductor device, even frequent switching will not affect the service life. At present, the main use of household lighting is incandescent lamp, fluorescent lamp and energy-saving fluorescent lamp.
(4) fast response: LED the response frequency of the f tau tau and injection of minority carrier life MC related, such as GaAs materials made of LED, the tau MC normal range between 1-10 ns, the frequency response of about 16-160 MHz, appeared such a high response frequency of 6.5 MHz once enough video signal, this is one of the key elements of the complete video LED large screen.
Currently, the lowest LED response time has reached 1 microsecond, while the most common LED response time is a few milliseconds, about 1/100 of the response time of ordinary light sources. Therefore, it can be used in many high frequency environments, such as automobile brake lamp or status lamp, which can shorten the braking time of the vehicle behind the vehicle and improve safety.
(5) high luminous efficiency: the luminous efficiency of incandescent lamp and halogen tungsten lamp is 12-24lm/w (lumen /w), and that of fluorescent lamp is 12-24lm/w
50 -- 70lm/w, the light efficiency of sodium lamp is 90 -- 140lm/w, and the power consumption of large parts becomes heat loss. LED's light effect can reach 50-200lm /w after modification, and the light has good monochromatism and narrow spectrum, so it can directly emit colored visible light without filtering.
(6) small size of LED components: it is more convenient for the layout and design of various equipment, and it can better achieve the effect of "no light source is seen in the light of night scene lighting".
(7) high energy concentration of LED light: concentrated in a small wavelength window with high purity.
(8) strong directional LED luminescence: the luminance attenuation is much lower than the traditional light source.
(9) LED low-voltage direct current can be driven: it has the advantages of small load and weak interference, and has low application requirements.
(10) the composition of the luminous spectrum can be well controlled: thus it can be well used for some or key lighting in museums and exhibition halls.
(11) it can control the size of the semiconductor luminescent layer and the semiconductor data to stop the band amplitude: thus, it can emit various colors of light, and the color is higher.
(12) high color rendering: it will not cause harm to people's eyes.