"Leadlights, leaded lights or leaded windows are decorative windows made of small sections of glass supported in lead cames. The technique of creating windows using glass ...
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and lead came is discussed at came glasswork. The term leadlight could be used to describe all windows in which the glass is supported by lead, but traditionally and correctly, a distinction is made between stained glass windows and leadlights, the former being associated with the ornate painted images on windows of churches and other such works of architecture and the latter with the windows of vernacular commercial and domestic architecture and defined by its simplicity." - (en.wikipedia.org 28.09.2019)
