Interesting stuff, Penguin.
Many things I've learned have been just someone's opinion, and we know what they say about opinions. But, this is cold, hard facts.
I have a GE Lucalox 400w HPS and a Phillips ceramalux son agro 430w HPS. Last grow, I swapped to the 430 after sexing. Please let me know if I'm wrong, but it appears that's not the best thing I could be doing for my plants! Right? Just keep the 400w HPS in (along with the 400w MH, dual spectrum system) all the way through?