I hope you have what Sunnie needs, Greene. I have already posted that my greenhouse in full sun has 70% shade cloth over it spring and summer. I am quite sure I could have used 80% just as well. Regardless of shade cloth, my greenhouse in full sun get so hot during the summer months, it is basically unsuitable for growing much of anything. It is not the sun, it is the heat. I guess they are called "hot-houses" for a reason.
When it is 95-100F outside, it will be no less than 120F in that greenhouse. I have fans running, but all they do is move hot air around.
