{TAIL ~ The emitted radiation} preferably has {HEAD ~ a spectral radiant power distribution}, for which the maximum is at a wavelength in the infrared range 
{ TAIL ~ The emitted radiation } preferably has { HEAD ~ a spectral radiant power distribution } , for which the maximum is at a wavelength in the infrared range
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH