Abstract: An LED dimmer circuit has a constant current source, a dual pole, dual throw (DPDT) switch and two arrays of LEDs. In one position of the DPDT switch, the arrays are in series; in the other position the arrays are in parallel. When the arrays are connected in series, all the current from the constant current source flows through both arrays and illumination is high. When the arrays are in parallel, the current from the constant current source equally divides. The one or more printed circuit boards may use one constant current source when the DPDT switch is in one position and a different constant current source when the DPDT switch is in another position.