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Christian Bartenbach's daylighting design appeared at the forefront of modern architecture thanks to the eco-friendly and low-energy architectural trend that emerged from the 1960s. In particular, it became to receive global attention when his lighting design was used as a key theme for the ‘Hong Kong & Shanghai Bank’ at the end of the 1970s. Since his ideas were so unique that they went beyond the level of simple lighting equipment and had significant effects on modern architectural trends such as high-tech, eco-friendly, and smart-eco. According to the results of the study, the characteristics of his lighting design technique can be summarized into largely three ones. First, optical systems were devised and used to overcome the disadvantage of sunlight, which is difficult to control. These systems can be classified into sunlight induction, radiant heat prevention, and anti-glare systems. These systems enabled lighting even at places where lighting was impossible with classical methods. The second characteristic is lighting design from the viewpoints of behavior and aesthetics. Based on the ecological modern perception theory, he developed an original perception theory about the relationship between light and spatial perception called 'dark-brightness-technology' to design stable and comfortable lighting environments. He also implemented architectural aesthetics with sunlight such as creating spaces, executing high-tech-eco architectural designs, and expressing artistic objects. Finally, he is evaluated to have opened a new horizon by executing state-of-the-art smart lighting architecture that responds to changes in sunlight with artificial intelligence.