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In regions with shorter photoperiods, flowering and fruit development are limited, making light supplementation a promising strategy. However, its effects on fruit quality, particularly across different cultivars, remain insufficiently explored. This study aimed to evaluate the influence of LED light supplementation during flowering on the physicochemical characteristics and bioactive compounds of pitaya fruits.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>RESULTS<\/jats:title>\n                    <jats:p>\n                      Plants of \u2018Boreal Red\u2019 and \u2018Chinesa\u2019 (\n                      <jats:italic>S. undatus<\/jats:italic>\n                      ) and \u2018Roxa do Par\u00e1\u2019 (\n                      <jats:italic>S. costaricensis<\/jats:italic>\n                      ) were subjected to light supplementation for 4\u2009h daily (20:00\u201324:00) during the flowering period (20\u2009\u00b1\u20093\u2009days) using full\u2010spectrum LED lamps (400\u2013700\u2009nm). Fruits were harvested at commercial maturity and analyzed for physical, physicochemical, and biochemical attributes. Light supplementation significantly increased fruit mass (19.04%), peel brightness (4.19%), peel chromaticity (5.31%), pulp hue (66.65%), fructose (29.17%), and vitamin C (6.73%) across cultivars. Additionally, \u2018Boreal Red\u2019 exhibited increases in pulp hue (30.67%), sucrose (23.19%), and glucose (30.12%).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>CONCLUSION<\/jats:title>\n                    <jats:p>\n                      Light supplementation during flowering positively influences fruit quality attributes in pitaya, enhancing both primary metabolites such as sugars, and bioactive compounds such as vitamin C. These findings support the use of light supplementation as a strategy to improve fruit quality under short photoperiod conditions, contributing to the development of more efficient cultivation practices in Brazil. \u00a9 2026 The Author(s).\n                      <jats:italic>Journal of the Science of Food and Agriculture<\/jats:italic>\n                      published by John Wiley &amp; Sons Ltd on behalf of Society of Chemical Industry.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/jsfa.70914","type":"journal-article","created":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T04:29:33Z","timestamp":1785385773000},"page":"8503-8514","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The effect of light supplementation on the changes in outer and inner fruit quality of different\n                    <scp>\n                      <i>Selenicereus<\/i>\n                      spp.\n   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