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 SòngYuán 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.