I have been reading much about this topic on this site and others, along with written reference material and I see the same things being said:
1.) zoas need "intense" lighting
2.) zoas do best under PC, T-5, VHO (not MH) - mid level, medium flow
3.) zoas will have the truest color under MH
4.) zoas can be burned under MH
So guess this leaves much to interpretation...........