Research on Campus Landscape Lighting energy Sustainability Based on Emergy Theory

The sustainability assessment of landscape and architectural lighting is a challenging research. This paper uses a new ecological assessment emergy method to evaluate the ecological sustainability of campus lighting design. The research results show that the emergy of architectural lighting occupies the main energy, which is determined by the main function of the campus. Due to students' activities in class, the energy consumption of architectural lighting is much larger than that of campus landscape. The energy value of each luminaire in landscape lighting is at a low level. The three indicators of sustainability are: ELR=2.21; NEYR=2.46; ESI=1.12, indicating that the overall energy consumption of lighting has little impact on the environment, and the relative relationship is relatively harmonious; at the same time, lighting design cannot produce high energy value. The sustainability index for campus lighting was 1.12, which was in a more reasonable state. Based on the perspective of emergy, this article discusses the sustainability of campus landscape and architecture and provides a new idea for the sustainability assessment of lighting design.