LED illumination device

An LED illumination device includes an optical section disposed at a bottom end of the LED illumination device, and in which a light source is provided. A heat dissipation section located adjacent to the optical section includes a plurality of fins thermally contacting the light source. The electrical section is disposed at a top end of the LED illumination device and electrically connects with the light source. The heat dissipation section is disposed between the optical section and the electrical section. The electrical section defines a plurality of air exchanges communicating the inside of the electrical section with the heat dissipation section and a plurality of exhaust ports communicating the inside of the electrical section with an external environment of the LED illumination device.