The spatial condition and both the technical and economic feasibilities for the layout of the light - court for the auxiliary powerhouse under the condition of higher fluctuation of the flood level downstream is basically analyzed ; in which the principles of the layout and both the spatial dimension and configuration are discussed , and then a actual design case is given with the preliminary evaluation on the ventilating and lighting effect of the light - court 初步分析了下游洪水位变幅较大等环境条件下，贯流式水电站副厂房设置自然通风采光天井的空间条件及其技术性和经济性，讨论了天井布置原则和空间尺度与形态处理，给出设计实例并初步评价了天井通风采光的效果。
