So, I put the MH bulb in, and took the HPS bulb out. Pictures are better now. I started giving them some outside time when temperatures are warm enough. The tallest is #1 at 28 inch. #2 is only 18 inch. I know #2 had a minor nutrient issue a couple weeks ago, new growth is all good, but I wonder if I stunted her. #3 is 24 inches tall. It is the fullest of the 4 plants. #4 is slow as well, and is 20 inches tall. Side growth on all 4 is good, but #1 is definitely stretchy, large internodal gaps.
Looking great... I like the structure of number 3. I also have the same mutation you are describing and amazed at the growth and structure. Already a favorite!