a reflector configured for reflecting light emitted from a light emitting diode toward a desired area is provided . the reflector defines a groove therein for accommodating the led . light emitted from the led is reflected by an inner surface of the reflector toward a desired area located below the reflector , wherein the light reflected out of the reflector travels along a direction opposite to the main emitting direction of the led . an led illumination device incorporating the reflector is also provided .