A heatsink that is designed with a Korean-style smooth curve. The product improves heat performance, which is aided by its aluminum die-cast design and thermal diffusion analysis. It has an optimal heat distribution design and is very light thanks to the interval and form of the LED module and heat-flow analysis simulation. The product eliminates corrosion caused by salt water and acid rain, which becomes a problem when installed outdoors, with the help of a specially-colored coating that is applied using a special aluminum die-cast anodizing technique. This product is ideal for any use where high resistance to corrosion is important.