If your aim is to grow a large plant?Then flower with a HPS.....hands down.
I take advantage of floro technology with 12/12 rooted clones (cuttings with roots long enough for my style of grow put directly into 12/12)
I flower with 19" (48cm) height from overflow tray bottom to floro tube bottom.
Once I do a run or two from a selected mother,I know how to apply the best LST technique or techniques(ie topping early,mid,or late stretch depending on strain).
I will do a partial harvest.I start reducing nute strength when major stretch,and weight gain slows.Then I wait till about 2-3 wks before now known harvest(strain dependant).I harvest about 30-50% of upper plant being real gentle with proper tools.I raise plant over the next couple days to let light penetrate lowers so they bulk up.The prior reduced nute strength helps the plant balance out from the harvest.I let the plant continue till harvest.When the younger partial harvest is dried.I can enjoy a smoke with a different flavor/high profile than that of the mature bud (wich of course being more potent).For one Blueberry hybrid I have.A snap to the taste buds Bazooka Joe bubble gum taste that is not found in the fully mature bud.
Floros have limited range (12"/30cm).Take advantage of this range by getting to know your strain.Floros are great for mothers,but if you want to flower with them?The proper LST techniques are needed for your style,and setup.A partial harvest is not needed if you LST'ed or scrogged correctly to compensate for floro range.
Happy Growing.
BTW in the first 2 pics front and center.The plant was harvested but some popcorn bud was left on for further bulking,and further ripening testing.
The tubes are PLL 55W diy with Fulham ballasts with 50/50 grow/bloom spectrums.PLL is in essence,a bent in half T5.
The other plants/strains are in mostly in early to mid flower with a preggers in the back,near the right corner.
Final note on floros:The frost is there,but HID like swollen calyx's will be lacking for anyone looking for that specific bag appeal.I wondered if a bloom spectrum only flower will help that,but the crystal like gleam from the 50/50 is good enough for me.Remember most of all.Most manufacturer lumen rating is measured at 12".Keep your bud in that range,and new plants/clones eased into it.
It's a kinda magic.