Design of system controlling light in sunlight greenhouse

Light environment in a sunlight greenhouse exerts a decisive influence on growing and development of crop and automatic control of light environment in the sunlight greenhouse plays an essential part in performing high output and high efficiency.The study of a control system suitable for day-lighting and addition-photo in sunlight greenhouse is introduced,including plant design,element choice and design of control circuit are introduced,which lay the foundations of performing automatic control of photo in the sunlight greenhouse.