Put your light on full bloom not full spec, i dont know if you got my message, but looks good there in full flower and have stopped growing vertical so yea change the spec to bloom, i recommend Atami Bloombastic for flower 1 and 1 halfml per US gal, here is a pic of ghost haze at day 79 it has been under bloom for around a month, just flushed out with cold water bc it helps to turn ur pistols and plan to chop in next 10 days, sativa dom strains take a bit longer than indica strains. But your grow looks good u seem to know what ur doing.