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