i agree, genetics/pheno's that frost, will frost given enough par.
Did you read what precipitated this light quest? I have never discounted genetics and my genetics have been getting people high since the early 1990s. It is still around for a reason. I started with MH only because the guy who got me started instructed me to. It was here I started reading that most ran HPS during flower.
So after 3 successful newb grows that saw increased yields every grow, I bought a HPS for use in grow 4. Being a newb on your first grow you are pretty excited to see those first trichs forming and you remember when it happens. Under the MH it was at 3 weeks. Like my current grow pictured in the first thread here. Sooo, when at 3 weeks under the HPS there was nothing it got my attention. The next 3 showed some frost but no where near what I had come to expect. At day 50 I gave up on the HPS and switched back to the MH.
All other factors were virtually identical to grow 3.
The HPS bulb is a cheapy but built for growing (ipower 600w Super Hps Hortilife). Not alot of blues though and I figured it was missing the little bit of UV the MH was providing. Thus what you see here.
Yeah, so my genetics respond favorably to a little more UV. What is your explanation?
On another note, Mr Sunshine is a troll of mine and a fraud and everything he purports about me is fabrication and the only reason he is here is because Uncle Puke told him to be and like a good flying monkey he obeys.