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