I ran gavitas in ACDE hoods in a small room with 10 foot ceilings. Loved them. Lost 2 feet of ceiling height and went back to SE HPS. Looking forward to building another room with enough head room for them again.
I run trellis also usually two - three rows. I found I got more/better penetration with leds vs the 315s. I was able to grow more dense plant count in the same place adding weight without bud quality fall off. Over a 4x8 space I had 3 315. With a canopy thickness of around 12-20” thick. Over that I would get a little larf below. Vs leds with a 2-4 ft thick. My friend did a 4x8 with 4 315s staggered she pulled more weight but had similar issues with penetration.
youve got personal results but theres scientific research on phytochromes and maybe if your light was stronger you wouldnt need the side light and youd have stacks of phytochromes. I probably got that mixed up but theres a photoreceptor which stacks up and strong light penetrates the stack and if you side light it tends to make the stacks on the main buds less. The stacks orient to the light source, thats why single point sources like a hps filament with no reflector do well.