Light is a crucial environmental cue for plant growth and development but can represent an abiotic stress factor when in excess or insufficient. Moreover, certain parts of the light spectrum, particularly the ultraviolet-B (UV-B, 280-315 nm), represent a significant threat by damaging DNA and causing the accumulation of reactive oxygen species (ROS). As sessile organisms, plants cannot escape UV-B stress and damage. Plants possess multiple photoreceptors that can perceive specific wavelengths and trigger appropriate downstream signaling responses, regulating major physiological processes. For instance, UV RESISTANCE LOCUS 8 (UVR8) efficiently perceives UV wavelengths. UVR8-mediated responses to UV-B include photomorphogenic changes such as de-etiolation and acclimatory responses involving the accumulation of UV-B-absorbing secondary metabolites like sinapate esters or other phenylpropanoid derivatives. As the availability of several resources is limiting to plants, trade-offs between growth and defense responses are common under stress conditions. However, the relationship between photomorphogenic and acclimatory responses to UV-B remains to be elucidated. This study investigates the potential trade-offs between these two sets of responses using multiple approaches.