Péng Yòngguāng 彭用光 (fl. mid-late Míng), paediatrician of unknown native place and lifedates. Author of Yuányòu xīnfǎ 原幼心法 (KR3ej031). The work cites Quányīng 全嬰 (Lǔ Bósì’s Yīngtóng bǎiwèn 嬰童百問) and the conventional Sòng-Yuán paediatric corpus, suggesting a mid-to-late Míng date (16th–17th c.). The yòngguāng àn 用光按 (editorial-comment) form distinctive of the work indicates an annotative compilation style. No CBDB record; no other biographical evidence.