Three of the five LED's, on one of the two 5-LED ring patterns on the taillight do not work except when the brake is activated, then they work fine. It is the right side ring. You can see them faintly glow a bit but that it is. They light up great with the higher voltage brake light power applied, just not with the lower voltage taillight (running light) itself. Are these replaceable bulbs? Any idea what may be occuring?