You're going to need an air cooled hood to run in the tent.
That being said,
Run @ 600w all the time.
Seedlings =12k Lux. Gradually increasing to no more than 60k Lux by week 2-3 depending on growth. Run anywhere from 55-60k Lux the whole grow.
All of this is assuming you got an air cooled hood and can get the light close enough.
I run 3.3kW of HPS/MH/CMH.
My lights vary from 36"-10" above the canopy depending on the situation.
It's about Lux/Par amounts @ the canopy, not light height. Grab a meter off Amazon for $20. You'll be glad you did.
Follow those numbers and you'll get a helluva lot more smoke than last time.
Link to my grow is in my signature if you want to see results from those suggestions.
Best of luck to you and good choice on switching to HPS.