EXPERIMENTAL EVALUATION OF DAYLIGHTING AND SUPPLEMENTAL LIGHTING EFFECTS ON THE GROWTH OF WOODY PLANTS IN WORKPLACE ENVIRONMENTS

Abstract

This study investigated the effects of daylight introduction and supplementary lighting on the growth of indoor plants, focusing on woody species (Quercus myrsinifolia, Cinnamomum camphora) and Epipremnum aureum in workplace environments. E. aureum maintained growth under office lighting (600–700 lx), showing acclimation (e.g., reduced SPAD values) to mitigate photoinhibition under daylight. Woody species exhibited acclimation, such as decreased chlorophyll a/b ratios and increased leaf weight ratios under general and supplementary lighting (~1600 lx), enhancing photosynthetic efficiency. However, growth was hindered by office-specific factors, with neither lighting condition significantly improving woody plant growth, highlighting the need for tailored management strategies.