The processing unit transmits an illumination signal to {TAIL ~ the ballast} via {HEAD ~ the first interface}, such that the ballast controls the illumination of the lamp according to the first waveform 
The processing unit transmits an illumination signal to { TAIL ~ the ballast } via { HEAD ~ the first interface } , such that the ballast controls the illumination of the lamp according to the first waveform
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH