Light characteristics and its changing laws in solar greenhouse

The seasonal and daily changing laws of light time, solar radiation, transmission rate of solar radiation and the space distributing laws of solar radiation inside solar greenhouse were studied. Regression analysis of the correlation between solar radiation inside and outside greenhouse, solar radiation inside greenhouse and time under different weather conditions in each season was made and the corresponding regression equations were developed. By these equations, the solar radiation inside greenhouse at any time under different weather conditions in each season can be calculated and analyzed.