With bai with the progress of science and technology, and the application of new technology of du, dozens of zhi, or even hundreds of years ago, people will be the window material dao by the yarn or paper into a glass, first light transmittance of glass also is not very good, but always can realize the desire of the people of science and technology, increasing the transparency of glass, indoor daylighting is also increasing.But there is also a difference, that is, in the summer enough light and heat will make the indoor temperature rise a lot.So how can you reduce your indoor light caloric intake?...