First (sorta) Grow! Question about 4x8 grow tent layout...

[Death The Cultivator]

You rock! Thank you so much for all your feedback so far, it's truly appreciated!! That makes sense. The tent is 96x48x80in, so if the height is 6'8" and im losing 1' from the pot, i'll have about 5'8" but the light will be probably 6-8" of that (i think that HLG550 V2 R-SPEC needs to be pretty much as high as it can be in there right? And still might have to dim for veg? I think they want it 22" off the plants too... so i guess 22+6+12 (40 inches) lost, looks like i'll have room for up to 40" plants? my math look ok here?

You have over 4ft if space between the top of the pot and a 12-18" light distance. 6'8 - 2ft is 1-1.5ft hanging from the ceiling and 1ft above ground for the pot.

The light doesn't needed to be super high but turning it down for the first week or two will roots establish and fan leaves establish to start photosynthesis. I would start The boards 40" above and adjust from there.