Ac led lamp

An alternating current (AC) light-emitting diode (LED) lamp, comprising:

• a first AC power end;
• a second AC power end;
• a lighting module having a first end, a second end and at least one LED unit, wherein the first end is directly connected to the first AC power end, and the at least one LED unit has one or more LEDs connected in series;
• and
• a direct current (DC) power output circuit having a first end and a second end, wherein the second end of the DC power output circuit is electrically coupled to the second AC power end, the first end of the DC power output circuit is electrically coupled to the second end of the lighting module, wherein the DC power output circuit has a DC output side,
• wherein the DC power output circuit is not directly connected to the first AC power end,
• wherein the DC power output circuit has a rectifying unit and a voltage limiting and filtering unit, and the rectifying unit and the voltage limiting and filtering unit are electrically coupled to the lighting module in series,
• wherein the DC power output circuit further includes an inverse diode having one end electrically coupled to the rectifying unit and another end electrically coupled to the voltage limiting and filtering unit.

An alternating current (AC) light-emitting diode (LED) lamp, comprising:

• a first AC power end;
• a second AC power end;
• a lighting module having a first end, a second end and at least one LED unit, wherein the first end is directly connected to the first AC power end, and the at least one LED unit has one or more LEDs connected in series;
• and
• a direct current (DC) power output circuit having a first end and a second end, wherein the second end of the DC power output circuit is electrically coupled to the second AC power end, the first end of the DC power output circuit is electrically coupled to the second end of the lighting module, wherein the DC power output circuit has a DC output side,
• wherein the DC power output circuit is not directly connected to the first AC power end,
• wherein the DC power output circuit has a rectifying unit and a filtering capacitor, the rectifying unit is electrically coupled to the lighting module in series and has a forward rectifying diode unit, the forward rectifying diode unit includes a plurality of diodes connected in series, and the filtering capacitor is electrically coupled to at least one of the diodes of the forward rectifying diode unit in parallel.

An alternating current (AC) light-emitting diode (LED) lamp, comprising:

• a first AC power end;
• a second AC power end;
• a lighting module having at least one LED unit and first and second ends directly connected to the first and second AC power ends, respectively, wherein the at least one LED unit has a plurality of LEDs connected in series;
• and
• a direct current (DC) power output circuit electrically coupled to at least one of the plurality of LEDs in parallel and having a DC output side.