Lighting apparatus

A lighting apparatus for receiving an alternating current power, comprising:

• a LED module;
• a constant current source providing a driving current to the LED module;
• a bridge rectifier for converting the alternating current power of a first frequency to a direct current power with a second frequency, wherein the second frequency is two times of the first frequency;
• a silicon-controlled rectifier connected to the alternating current power and the bridge rectifier for adjusting the direct current power with a chopping signal;
• a wireless module for receiving an external control signal;
• and
• a detector for generating a dimming control signal supplied to the constant current source to adjust the driving current according to both the external control signal and the chopping signal, wherein the detector converted the chopping signal to the wireless module to generate a status signal sent to an external device, wherein the external device generates the external control signal based on the status signal, the external control signal has a set of commands sent to the detector.