Daylight's critical significance for both the built and natural domains underscores its potential to enhance energy efficiency and environmental sustainability in architecture. This study presents a careful exploration, using a tailored case study, to reveal diverse strategies for leveraging daylight's inherent attributes as a building material. Integrated climate adaptation serves as the bedrock of architectural projects, fostering regenerative development as well as liveable and sustainable spaces. This research delves into daylight's complexities, positioning it as a primary input in early architectural stages. Through comprehensive analysis in Uruguay and Sweden, this study highlights the interplay of daylight's effects. An experimental cabin serves as a focal case study, bolstered by Climate Studio software, yielding a thorough daylight analysis across these locations. The synthesis of academic and practical approaches underscores daylight's pivotal role in shaping sustainable built environments.