There was another recent thread on this, and consensus was also HIGHER LIGHT. You have some nice lights there, but how far are they hanging from this plant? For flowering purposes, probably anything more than around 18-20" isn't close enough. I recently jumped down a rabbit hole for light conditions of digbyana after the other thread mentioned and found a chart showing how far a P600 Watt Platinum LED needed to be placed to achieve 3600 foot candles of light. Wish I could find that chart again.
I grow everything in SH, and approve of your container.