A thread across all of our research works is the connection and conversion between photometric and radiometric aspects, or a simple keyword - Wavelength. This connection is important to forming the fundamental phenomenon (e.g., photothermal effect, fluorescent effect, visual-thermal interaction) and then leading application performance (e.g., thermal and optical behaviors of building envelopes, solar irradiance utilization, food-energy-water nexus, individualized indoor comfort). Our research methodology combines experimental, numerical, and subjective studies. In addition, our lab also develops new models, approaches, design methods, and computational tools in support of the research activities in this domain.