My NLX haze Are only 4 days old and I can tell that they grow alot faster than indica.
Because the light doesn't move across the sky like outdoors It is very inefficiant to grow so tall.
Lst is essential in this case so as not to waste time.
They will prob still reach near that height with lst.
Remember to minus the distance from your lights to plant top u prob only have 1.7 meters to work with
Its doable and very easy