A method of transmitting, over a three-phase power system, a first data packet and a second data packet to the lighting fixture network via manipulation of a single transformer, wherein said three-phase power system comprises a neutral line, a first phase line adapted to provide a first input voltage, a second phase line adapted to provide a second input voltage, and a third phase line adapted to provide a third input voltage, said single transformer including a primary winding, a first secondary winding coupled in series with the first phase line, a second secondary winding coupled in series with the second phase line, and a third secondary winding coupled in series with the third phase line, wherein a phase difference between each of the first phase line, the second phase line and the third phase line is one-hundred and twenty degrees; the method comprising: - receiving data indicative of appropriate lighting fixture settings for one or more lighting fixtures of the lighting fixture network; - identifying the first data packet based on said data; - selectively coupling the primary winding to the neutral line and the first phase line via a first switch, a second switch, a third switch and a fourth switch so as to receive the first input voltage; - supplying, via the single transformer, a first output voltage over the first phase line, a second output voltage over the second phase line, a third output voltage over the third phase line to respectively a first lighting fixture group, a second lighting fixture group, and a third lighting fixture group of said lighting fixture network; - selectively activating the first switch, the second switch, the third switch and the fourth switch during certain positive half-sine cycles of a first sequence of sine cycles of the first input voltage to cause at least one of a voltage drop and a voltage rise of the first output voltage, the second output voltage and the third output voltage during said certain positive half-sine cycles and not activating the first switch, the second switch, the third switch and the fourth switch during the rest of half-sine cycles of the first sequence of sine cycles of the first input voltage, wherein said selectively activating is done in correspondence with said first data packet; and - identifying the second data packet based on said data and selectively activating the first switch, the second switch, the third switch and the fourth switch during certain negative half-sine cycles of a second sequence of sine cycles of the first input voltage to cause at least one of a voltage drop and a voltage rise of the first output voltage, the second output voltage and the third output voltage during said certain negative half-sine cycles and not activating the first switch, the second switch, the third switch and the fourth switch during the rest of half-sine cycles of the second sequence of sine cycles of the first input voltage, wherein said selectively activating is done in correspondence with said second data packet. - receiving data indicative of appropriate lighting fixture settings for one or more lighting fixtures of the lighting fixture network; - identifying the first data packet based on said data; - selectively coupling the primary winding to the neutral line and the first phase line via a first switch, a second switch, a third switch and a fourth switch so as to receive the first input voltage; - supplying, via the single transformer, a first output voltage over the first phase line, a second output voltage over the second phase line, a third output voltage over the third phase line to respectively a first lighting fixture group, a second lighting fixture group, and a third lighting fixture group of said lighting fixture network; - selectively activating the first switch, the second switch, the third switch and the fourth switch during certain positive half-sine cycles of a first sequence of sine cycles of the first input voltage to cause at least one of a voltage drop and a voltage rise of the first output voltage, the second output voltage and the third output voltage during said certain positive half-sine cycles and not activating the first switch, the second switch, the third switch and the fourth switch during the rest of half-sine cycles of the first sequence of sine cycles of the first input voltage, wherein said selectively activating is done in correspondence with said first data packet; and - identifying the second data packet based on said data and selectively activating the first switch, the second switch, the third switch and the fourth switch during certain negative half-sine cycles of a second sequence of sine cycles of the first input voltage to cause at least one of a voltage drop and a voltage rise of the first output voltage, the second output voltage and the third output voltage during said certain negative half-sine cycles and not activating the first switch, the second switch, the third switch and the fourth switch during the rest of half-sine cycles of the second sequence of sine cycles of the first input voltage, wherein said selectively activating is done in correspondence with said second data packet.