Thermal design of a 16W LED bulb based on thermal analysis of a 4W LED bulb

Simple experiments were conducted to obtain surface and lamp hold temperatures of a main-stream 4W LED bulb, which is on sale in the market. Two kinds of thermal calculations were also done based on the data from measurements. The total heat dissipation rates in those two thermal calculations are close to each other, which demonstrate that the thermal calculation is feasible for thermal analysis of LED bulb. A thermal design of a 16W LED bulb was proposed based on the proposed thermal analysis method. Meanwhile, simulation done by commercial software COMSOL was used to check the design. The results show that thermal performance of the 16W LED bulb is as good as expected and can maintain low junction temperature in general environments.