LED illumination device for spotlighting

An LED illumination device for spotlighting, comprising:

• a lower case having a plurality of planar inner surfaces so that a light outlet on a bottom thereof has a polygonal shape;
• an upper case positioned above the lower case to accommodate a power supply unit therein;
• substrates coupled to the respective planar inner surfaces of the lower case and having LEDs mounted thereon such that light-emitting surfaces of the LEDs are directed to a center of the polygonal light outlet;
• a reflector coupled to cover the light outlet of the lower case;
• a dimming controller configured to control electric power of the power supply unit in response to an external control signal and to supply the controlled electric power to the substrates;
• and
• a plurality of heat dissipation fins protruding along a circumference of the lower case, spaces between the heat dissipation fins being in communication with one another in a vertical direction of the lower case,
• wherein the reflector has a through-hole through which the dimming controller is exposed downward.