An LED array includes a plurality of first and second light-emitting rows. Each of the first light-emitting rows is composed of a plurality of red and green LEDs arranged linearly alternately. Each of the second light-emitting rows is composed of a plurality of green and blue LEDs arranged linearly alternately. The first and second light-emitting rows are parallel to each other and arranged alternately. Thus, the LED array can generate preferably equable arrangement of colored light to output preferably equable light mixture. In any 2.times.2 matrix, there are two green, one red, and one blue LEDs.