The lifetime of LED Lighting greatly depends on the heat dissipation, so one of important technique is to improving the heat dissipation. The chips produce more heat, so we mainly need solve it out by heat sink and heat dissipation, which is a very complicate technique.
We should think how to solve the heat dissipation. And the LED lighting power really need heat dissipation. LED power is the lighting diode of working current above 110mA. Now there are two kinds of direct voltage, 2.1V and 3.3V, and the input power is above 210mW and 330Mw. Many people have different ideas, but in fact, the practices have proven that the heat dissipation of LED power affects the LED lifetime.
The main parameters of LED heat dissipation are thermal resistance, junction temperature, temperature rise, etc
Thermal resistance is a significant parameter of heat dissipation. Nowadays, LED heat dissipation reaches great than or equal to 10℃/W, which is a very good phenomenon.
Junction temperature represents the acceptable value in the working circumstance of LED device. So America SSL project makes the higher goal to improve the heat tolerance.
Temperature rise is different from thermal resistance and junction temperature. Here, we share the surrounding temperature rising in the tube-shell. When the surrounding temperature is 30℃，the temperature of LED tube-shell is 60℃, so the temperature has risen 30℃. We can guarantee the lifetime of LED device. If the temperature is higher, the retention rate of LED lighting will be lower.