I have a grow room that is about 8’x4’, of which I use about half the space to grow 2-4 plants.
My current set up:
Lights:
ChilledLED X3-330
(2) HLG 150
Climate:
6" AC Infinity Exhaust
AC Infinity Climate Controller (Heat/Humidity)
70 pint dehumidifier used on occasion
No Ac - the room doesn’t generally get above 85.
My initial thoughts:
Add UV light or some sort of side lighting - not sure of the best spectrum for UV, and really don’t know if side lighting will make a difference.
600w in half a 4x8 is good. I perso ally dont subscribe to uv usage but never had issues in my 4x8 with your environment. 1 thing i did get and used exclusively in the 4x8 was a light rail. Works great if fill it up and dont want 1200w running in it. 900w on the rail closer to plant worked awesome. Side lighting isnt necessary in a mylar walled tent. It bounces around pretty darn good in my opinion.