Unverified50% confidenceDecision RuleTime unknown
购买嵌入式射灯前必须先确认吊顶开孔尺寸，灯具开孔径需比预留孔小1-2mm，主流开孔为75mm和55mm两种规格，买错无法安装
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Unverified开孔尺寸需先量吊顶已开孔再选灯，主流开孔为75mm和55mm两档，灯体开孔比标注尺寸大2-3mm留余量，翻新换灯若原孔位不匹配需选带可调卡簧或大尺寸面环的产品遮盖旧孔86% similarUnverified洞洞板孔间距标准分25mm和30mm两种，选购配件前必须确认孔距与板材一致，不同厂商孔距不通用会导致挂钩无法安装80% similarUnverified常规住宅吊顶预留开孔尺寸多为75mm，选购前需实测吊顶开孔直径，筒灯外径需比开孔大3-5mm以便卡簧固定，切勿买等于或小于开孔的规格79% similarUnverified选购前必须确认孔径与孔距规格：主流有两大体系，欧标孔径6mm/孔距25mm（PegBoard系）与日系孔径5mm/孔距40mm，配件不通用，跨体系混买会导致挂钩插不进或松动78% similarUnverified洞洞板孔距主流规格为25mm和22mm两种，购买配件前必须确认孔距一致，否则挂钩无法插入或松动脱落。选购时优先选25mm这类通用规格，配件市场选择更广78% similar
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