My greenhouse is very bright in the mornings up to 11am. After that time it becomes well shaded with only dappled light. The lighting is created by a large oak on the south corner as seen by this airel pic
I do have shade cloth on the west wall and over the roof because the setting sun is too much after the heat of the day. Also less tree shade on that side for now as seen here notice the GH is on the shade and the house is in full sun
I find I do better with lowii if I keep them in a small pot or if a larger pot then only use 2/3 of it. I water every other day and fertilize every other watering at ~150 ppm.
Hope this helps.