Rick asked the LS..30 inches (75 cm)
Given that I have had no problems blooming countless number of multi's ..species and hybrids..i dont think there is a nutrient problem either. I screwed up by giving it direct sunlight, and its pretty obvious if you see the plant up close, there are some older leaves that weren't exposed to direct light that have that nice green color. I also gave a few other plants direct sunlight (but this was the only paph i did this too)..I had one Schromburgkia (i think), that turned yellow on one side while being green on the other , in that same period..my laelias loved it though.
and as i said before , when I grew under lights , I grew them on the high side , they grew and bloomed well, but yellow green..ever since putting everything in the greenhouse, all my plants are putting up leaves that are medium green. Its gonna take a few years for these plants i am keeping to fully integrate into that new lifestyle. This stonei is recalcitrant ..it should have bloomed by now..but I am losing patience with it..i would rather it go to a more appreciative grower who just has the magic touch or whatever..my asking price is what I paid for it 4 years ago when it was a one growth BS plant (it also had a start)..so it having grown like it did for four years (putting on 5 new growths in differing stages)..i think i am doing something right in that department