They do have more resin on the buds under the cmh bulb and I did notice they do finish earlier which is a bad thing when it comes to weight. I will do the same next run cmh for veg and HPS for flowering.This was my experience with 630 between 2 1000w hps. They looked better, frostier. But finished like 2 weeks early.
it sounds like a good thing but I was very skeptical of it. Figured there had to be downsides relating to cannabinoid / terpene profile.
I just use cmh to veg now.