I am going to be completely honest. Respectfully, I am leaning towards the belief that t5s using pr0fessuer's PAR method will flower out better than HPS. I haven't been able to compare side by side yet; I hope to present some solid evidance to support my beliefs. However, I think that there is something different about the wavelengths between HPS and t5s. I think T5s really shorten internode spacing despite what type of bulb you are using. I admit that I have yet to try incoproating more IR energy in my PAR spectrum (which I am told is what leads to stem elongation). When you veg with HPS the internodes are spaced further apart and this makes it more conducent to do LST methods imo. Once you put them to flower under t5s the internodes start growing closer together (which could be good if you are looking for density in your buds). I really cannot say which lighting method is better at this point. I think the mitigating factor would be sampling a strain grown under HPS and the same strain grown under PAR t5. One thing is for sure; I am glad to be taking this journey with so many intellectually stimulating folk.