Abstract: An LED assembly includes a first LED unit and a second LED unit, the latter is coupled electrically to the first LED unit in such a manner that each of the first and second LED units defines a current-flow direction in reverse order so that once Alternating Current is applied, the first and second LED units are illuminated alternately by virtue of the positive and negative voltages of the Alternating Current.

Abstract: A light emitting diode (LED) packaging comprising a stacked substrate, a main body, and an LED die is provided. The stacked substrate includes a heat spreader and a first circuit board. The first circuit board is stacked on the heat spreader. Two channels penetrate the first circuit board and the heat spreader. An upper opening of the channel is smaller than a lower opening thereof. The main body is formed on the first circuit board and has a through hole to expose part of the first circuit board. The main body further has at least two extended portion filling the channels for fixing the main body on the stacked substrate. The LED die is located in the through hole and electrically connected to the first circuit board.