As we all know, there are two kinds of light sources for moving head lights: lamp and LED. LEDs have a longer life span than lamp lamps.

Lamp moving head lights generally have a life span of 1500-3000 hours, while LED moving head lights generally have a life span of 20000-60000 hours.

At the same time, the light decay of LED moving head lights is not obvious, while the light decay of lamp is more obvious, especially after 1000-2000 hours. (Explanation, "light decay"-light decay generally refers to its luminous flux. When the surface of the photosensitive drum is charged, as the charge accumulates on the surface of the photosensitive drum, the potential will continue to rise, and finally reach the "saturation" potential, which is the highest Potential. The surface potential will drop over time. Generally, the potential during work is lower than this potential. This process of naturally decreasing the potential over time is called the "dark decay" process. When the photosensitive drum is scanned and exposed, it becomes dark. Area (referring to the surface of the photoconductor not irradiated by light) is still in the dark decay process; in the bright area (referring to the surface of the photoconductor of the part irradiated by light) the carrier density in the photoconductive layer increases rapidly, and the electrical conductivity rises rapidly, forming a photoconductive voltage , The charge disappears quickly, and the surface potential of the photoconductor also drops rapidly. It is called "light decay" and finally slows down. ---------From https://baike.baidu.com/item/%E5% 85%89%E8%A1%B0/8553492?fr=aladdin, to put it simply, it is the time for the light to change from bright to dark.)

Compared with lamp lights, why LED moving head lights have a longer lifespan?

First of all, you have to understand the principle of light emission, the difference between lamp (traditional lighting) and LED lighting.

The development history of lamp lamps has a long history. Since 1879, TA Edison in the United States made carbon fiber (carbon filament) incandescent lamps, people are constantly seeking various filament materials to obtain the best lighting effect and low Degrees of power consumption. (From https://jingyan.baidu.com/article/a17d52852370928098c8f229.html)

2) Generally speaking, the working principle of the lamp is related to its current, and it generates electricity through the internal metal tungsten wire and external current. (From http://www.coozhi.com/shenghuojiaju/shenghuochangshi/90310.html)

3) At the same time, the working principle of the lamp is also related to its internal gas. Generally speaking, the inside of the bulb is filled with a vacuum or other inert gas.When the lamp is working, it will make use of the high melting point of tungsten to make it into filament. -----(From http://www.coozhi.com/shenghuojiaju/shenghuochangshi/90310.html)

Simply put, a lamp is a device that converts electrical energy into light energy to provide lighting. It can be inferred that the light-emitting mechanism of lamp (traditional lighting) is that electric energy heats the light-emitting tungsten filament to emit light. After a long time of heating, the tungsten wire will age or even burn out, and the life of the lamp will come to an end. The aging time of tungsten wire is about 1000-3000 hours. This determines the service life of the lamp is 1000-3000 hours.

The light-emitting mechanism of LED is determined by the special composition structure of the diode. The diode is mainly composed of PN crystal plate, electrode and optical system. When the electrode of the PN junction is forward biased, it will cause the electrons in the PN junction to interact with each other. Holes cross the PN junction to recombine. In the recombination process, the excess energy is converted into light energy. Because the brightness of an LED is often not enough to meet the needs, a large number of LEDs are usually combined to form an LED light source (this kind of light uses a 220V AC lighting circuit to supply power, so the LED light source also needs an AC-DC conversion circuit to adapt to the needs of the LED. The demand is close to the constant voltage DC power demand).

The light-emitting process of LED includes three parts: carrier injection under forward bias, recombination radiation and light energy transmission.

(Image Source:

https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=diode%20%20PN%20crystal%20plate%2C%20electrode%20and%20optical%20sys&step_word=&hs=0&pn=1&spn=0&di= 122430&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=2637377171%2C3773140751&os=2225640292%2C1752177982&simid=4271878602%2C1752177982&simid=4271878602%&lnpicid=06862%2 &fmq=1629860006783_R&fm=&ic=&s=undefined&hd=&latest=©right=&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu 2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fslideplayer.com%2Fslide%2F9269733%2F28%2Fimages%2F30%2FCompleted%2B3D-Stacked%2BImager%2BWafer%2Band%2BDie%2BLayout.jpg%3refer%3D.jpg%26refer%3D 2Fslideplayer.com% 26app% 3D2002% 26size% 3Df9999% 2C10000% 26q% 3Da80% 26n% 3D0% 26g% 3D0n% 26fmt% 3Djpeg% 3Fsec% 3D1632452028% 26t% 3D35ed00d7970961f3cf4617eb492df50e & fromurl = ippr_z2C% 24qAzdH3FAzdH3Ffst1jrswyj6_z% 26e3Bv54AzdH3Ffst1jAzdH3Fldml0nnAzdH3F & gsm = 2 & rpstart = 0 & rpnum = 0 & islist = &queryl ist=&nojc=undefined)

It can be seen that LED mainly emits light by the continuous movement of carriers, and its special light-emitting mechanism determines its light-emitting life as long as 50,000 to 100,000 hours.In actual use, the life of the lamp is directly related to the life of other components. The lifespan of LED lamps is determined by the shortest lifespan among LEDs, chips and other components. Furthermore, the heat dissipation system of the lamp directly affects the service life of the lamp.

In summary, these are the reasons for the longer life of LED moving head lights.