i say pcln because you can then hook this up to pscn / nscn along with VOID replaced by INSL to prevent melting but you could also presumably switch out pcln for clne if you aren't going for allat
1px pcln(PHOT) surrounded by VOID on all but one side emits a constant stream of photons with no variations in direction or fluctuations in the amount, this phot can be turned into prot via travelling through hygn and will turn in a much more precise and efficient laser