If there is more resin, it might even be because something is missing. Which, in this case, would happen to be a good thing. Adding other colors might be counterproductive even.
Pure speculation, at this moment, but not watering a plant is meant to raise resin at the end of the plants cycle, too.

I can't remember if you are going to train the plants in some sort, LST, SCROG or keep them low as in a SOG, which I definitive would find beneficial (light penetration of the LEDs/ light fall off). No one would find that to be an unfair comparison to HID.

With those systems even two layers of LST-plants are possible where you can have only one with HID, since cooling and distance to the plants are a ruling factor, especially in cupboard grows.

But the most important thing is to have clear and straight grow. Don't fiddle about stuff, that can't be reproduced even by yourself.

Thumbs up, I'm reading this with pleasure.