The main function of the LED heat sink are to continuously export and dissipate the heat generated during the operation of the LED chip to the environment , so that the temperature of the chip is maintained within the required range , thereby ensuring that the LED lamp can work normally . The quality of the LED heatsink is mainly determined by the thermal resistance of the heat sink . The smaller the thermal resistance , the lower the LED lamp junction temperature under the same conditions , the lower the LED junction temperature , and the longer the chip’s service life . Therefore , the LED lamp radiator must have a certain heat dissipation area . At the same time , the material for making the radiator must have a certain thermal conductivity and a high thermal emissivity . In addition , the thermal conductive material should also have a light weight , easy processing , and low price . Features The thermal resistance of the LED heat sink should include thermal resistance and thermal resistance . For a certain shape of the LED heat sink , the thermal resistance are mainly related to the thermal conductivity of the heat sink material . The larger the thermal conductivity , the smaller the thermal resistance , and the better the thermal conductivity . Under certain environmental conditions , the thermal resistance mainly depends on the LED . Radiator cool area and radiator surface material emissivity , the greater the heat dissipation area , the higher the radiation coefficient , the smaller the thermal resistance , the better the cool effect . The so-called LED heatsink is a component that can quickly derive and dissipate the heat generated in the operation of the LED chip into the environment . Therefore , it is not enough to have a certain heat dissipation area as a heat sink , and the material for making the heat sink must have a certain degree of heat conduction . Sex , that is , to have a high thermal conductivity , in order to continue to export the heat generated by the chip , and ultimately dispersed to the environment ; of course , for the thermal conductivity of materials , in addition to thermal conductivity , but also should have a small proportion , low price , high strength , easy processing and other characteristics .