Shading

[PuiPuiMolcar]

Hello folks, I have this greenhouse lying at the West facing side of the home. In the winter right now, it get just enough heat and light to not burn the orchids. In the summer, there is almost no direct light hitting the tent, but I still want to reduce the intensity even more.

I've looked up that many people use Aluminet shade. Which percent does everyone reccomend to get? and what's the best source. Thank You in advance.