The main reasons determine the lifespan of LED down lights have three parts: LED lamp beads, led heat "shell design" and led power supply. LED lamp bead manufacturers determine the major life LED down light. Currently the top foreign chip manufacturers are American CREE, Japan's Nichia (Nichia), Citizen and so on.
General quality LED down light manufacturers will use foreign CREE LED chip, at least recognized as one of the high stability product on the market. Such natural light made ??of high brightness, long life, but the price is not cheap, using Taiwan manufacturers of chip life is long, but the price is relatively low, basically acceptable to the Chinese domestic mid-market customers. Chinese domestic market chip short life, the light fades larger, but the price is the lowest number of small manufacturers fight to become the first choice for the price. What kind of LED lamp uses, LED chips, LED down light also directly determines the positioning and manufacturers in the industry have shown social responsibility.
LED Power LED down light is the heart of a great impact on the life of LED down lights. In general, LED down lights have 110 / 220V power supply, China's domestic market is 220V power supply. Because of the shorter development time LED lights, the state has not addressed its standard power supply LED power supply on the market so uneven, ring like phenomena, a large number of low-PF value, simply can not supply the market is flooded by EMC. Power electrolytic capacitor life also directly determines the power of life, as everyone on the price-sensitive, ways to reduce the cost of power, resulting in low power LED power conversion, life is not long to make LED Down light from "longevity light" to a "short-lived lights. "
The cooling design of LED down lights influences their lifespan. Started from LED lamp beads, then the heat conducted to the internal PCB and then exported to the shell. The shell gives out heat by convection or conduction to the air. PCB to heat fast enough, thermal performance thermal grease to be good enough, enclosure cooling area should be large enough, the rational design of several factors determines the LED lights work properly when the PN junction temperature not higher than 65 degrees, in order to ensure LED the chip is in normal operating temperature because the temperature is too high and not too fast to produce the light fades.
