This Spring I finally "bit the bullet" and replaced my old black shadecloth on the greenhouse with Aluminet. Holy Cow, I continue to be amazed at what a difference it has made. I had no idea how good the Aluminet is. I've been using the 55% black plastic shadecloth on my greenhouse for many years. It worked fine for shade, but the greenhouse still got hot, even with a wet-wall evaporative system. I replaced it with 50% Aluminet this Spring. The biggest difference is that it has apparently dropped the inside temperature by as much as 20°F. This past weekend I had to work in the top of my greenhouse...usually a very hot, sweltering job. Outdoor day temperature here over the weekend was about 90°F, which usually means the top of the greenhouse would be 100°F or more, even with the evaporative pad and fans going. With the Aluminet, the temp in the top of the greenhouse was about the same as down on the floor level...about 78°F. I'm totally sold. BTW, the price has dropped substantially the last couple of years. I bought my Aluminet from EcoLogic in Maryland.