Abstract: An LED based lighting method and a lighting fixture thereof includes multiple LEDs mounted on an LED lamp stand and arranged in array; a convex lens is disposed to a front of each LED; depending on the quantity of LEDs, the area to be illuminated is classified into multiples illuminated units with each corresponding to one LED; convex lenses of different focusing angles of beam of light are selected in case of a fixed focal length or the focal length of each lens device is adjusted so to select or regulate for a proper LED illuminating angle; no dark area exists and the brightness of the area illuminated is very consistent since the spot created by the LED illuminating beam of light after focusing by the convex lens over the area to be illuminated merely covers its corresponding illuminated unit; all the LEDs are mounted on the LED lamp stand properly spaced at intervals and a housing of each LED is totally exposed in the air to skip heat radiation device for lowering production cost, and making the LED stree