Design of the Heat Dissipation for 4W High Power LED Lamp

At present, about 80 ~ 90% of high-power LED input power is converted into heat, so heat dissipation is a key factor affecting the use of LED. By the theory of thermal resistance, the heat conduction mode of the 4W high power LED light is obtained, and the effective cooling area of the LED radiator is computed. According to the EFD method the natural convection thermal analysis is conducted. Finally the heat experiment is conducted to verify the simulation results. The results show that the LED radiator meet the application requirement, namely the maximum temperature is less than 65°C. Undoubtedly the research will provide design guidance on the heat dissipation of LED lighting