I'm looking to buy shade cloth to help cool my greenhouse over the upcoming hot months of july -sept. I have Sarracenia, VFT, Drosera, Nepenthes and assorted tropicals. I have read that 50% is pretty Ideal for Nepenthes and can work for Sphag moss. The thing is I do not wan't to stress the light lovers so I think 50% is a bit too dark. How does 30% Aluminet cloth sound? Is that still too dark for Sarracenia and VFT's? Any input is greatly appriciated!