chasv77answered grow question 4 years ago This my opinion on this topic.
You can not control lux outside. In direct sunlight, it is what it is, on a clear sunny day.
The only thing that can influence the sun's intensity, is altitude and humidity.
As far as using indirect light(shade tree), that is a major drop from direct sunlight, and grow quality.
I grow at altitude (major UV), with mid 90's F temps. I don't have light burn, and my C99 seeds were also used in a grow box, so they have been in both environments.
They look great, see my diary.
The Haze strain has Sativa qualities, so hot temps should not hurt it. Maybe Indica Kush strains like cooler temps???????
Good luck and good growing!👌