How are you liking the grow? The plants look healthy and happy which is good work for first timer. Hope youre taking temperature and environment advice to heart, the first time as hps-er its usually hard to believe how hot you need your airtemps to achieve proper transpiration.
You got these from cutter
Hey Robbo, ask mark/welight about 2700k 90cri solskins, imo this one of the biggest advantages with going with cutter as they can make any spectrum you want, whereas hlg seems to be either 3000k 80cri or their R-Spec boards.
Ive made grow comparisons and the 2700k 90cri won in flower: faster development, bigger buds, transition/stretch was faster (and not really any extra stretch, att least not in flower).
You can get similar spectrums and results using extra reds and whatnot. But afaihs i think its better to have as much red as you can in your base white spectrum, rather than addinng it oon later. White diodes are made out of blue diodes but covered with a phosphor mix which gives tthe rest of the spectrum. Blue diodes have a few superior characteristics: they are very electrically efficient and the are much less affected by temperature than other leds. This means to me the more red you can squeeze out of your white leds the better.