Lower the intensity of the lamp and reduce the humidity to between 45%-55%, you'll see how it starts to flower. It won't start to notice until the third week of the light change.
It can keep growing until the end of its days, but reduce the amount of nitrogen to slow down its growth a bit.
I also recommend some defoliation (10%-15%), which also helps to stop the growth. You want the flowers to absorb as much light as possible.
Good luck!! 💪