Abstract: An LED light string includes series-connected groups of individual LEDs or sets of LEDs, with each LED or set of LEDs in each group being electrically in parallel with each other LED or set of LEDs and with a parallel group device that regulates voltage within the group when LEDs in that group fail. The current to the LEDs is rectified, either in the light string plug or receptacle, preferably the latter. The color of each light in the group, or colors of each set in the group must be the same but successive groups can include LEDs of different colors. In an alternative embodiment, the LEDs can be oriented so that half light on during the first half of an alternating current cycle and the other half light during the second half of an alternating current cycle.