In {HEAD ~ operation} {TAIL ~ the lamp} has a voltage of 109V, whilst the value for the coldest spot temperature Tkp 1299 k is and for Δλ 12.5 nm 
In { HEAD ~ operation } { TAIL ~ the lamp } has a voltage of 109V , whilst the value for the coldest spot temperature Tkp 1299 k is and for Δλ 12.5 nm
OTH HEAD HEAD HEAD HEAD HEAD TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH