The quantity and quality of light are both involved in a wide range of physiological and developmental processes in trees. The permanently and highly contrasted light environment within the crown of evergreen trees may affect the spatialization of reproductive bud burst. The objective of this study was to characterize the effects of light environment and architectural traits of terminal growth units on their reproductive bud burst in the mango tree. In July 2020, 440 terminal growth units were sampled on four mango trees, cv. Cogshall. Some architectural traits of the growth units (Diameter, Position, Localization within the crown) and their light environment (quantity: relative transmitted PPFD, or TrPPFD; and quality: red/far red ratio, or