{"schemaVersion":1,"slug":"iec-fluorescent-luminaire","name":"Linear fluorescent luminaire plan mark","kind":"symbol","abbreviation":"LF","aliases":["fluorescent fitting","tube luminaire","linear lamp fitting"],"category":"installation-communications","drawingTypes":["GA"],"referenceFamilies":["IEC"],"summary":"Plan mark for a linear fluorescent or tube luminaire, a long line with short end bars drawn to the fitting length.","description":["Linear fluorescent luminaires are drawn on IEC-style plans as a straight line with a short perpendicular bar at each end, laid out at the length and orientation of the actual fitting. The same form is widely reused for linear LED battens.","Because the line is drawn to length, the plan doubles as a setting-out drawing for ceilings. The fixture type tag gives the lamp length and wattage, and emergency versions add a mark or letter. The single line does not give the number of tubes. A separate multi-tube form shows two or more lines."],"readingNotes":["Measure or read the length tag.","Check orientation relative to ceiling grid."],"drawingChecklist":["Tag lamp length and type.","Coordinate with ceiling layout.","Show emergency fittings distinctly."],"distinction":"A multi-tube fitting shows parallel lines; this form shows a single tube or a generic linear fitting.","facts":[{"label":"Graphic form","value":"Line with end bars, drawn to length"},{"label":"Modern use","value":"Also used for LED battens"},{"label":"Exact standard graphic","value":"Not reproduced here; confirm the form against IEC 60617 and the project legend"}],"references":[{"sourceId":"iec-diagrams","relevance":"IEC graphical symbol context for installation plans; independently drawn here."},{"sourceId":"pub-object-engineering-design","relevance":"Installation design methodology covering lighting circuits and final distribution."}],"related":["iec-multi-lamp-fluorescent-luminaire","iec-luminaire-general-plan-symbol"],"artwork":"s28-iec-fluorescent-luminaire","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Fluorescent lamp luminaire","reference":"IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier."},"plainEnglish":{"title":"What does Linear fluorescent luminaire plan mark mean?","introduction":"Linear fluorescent luminaires are drawn on IEC-style plans as a straight line with a short perpendicular bar at each end, laid out at the length and orientation of the actual fitting. The same form is widely reused for linear LED battens.","example":"Because the line is drawn to length, the plan doubles as a setting-out drawing for ceilings. The fixture type tag gives the lamp length and wattage, and emergency versions add a mark or letter. The single line does not give the number of tubes. A separate multi-tube form shows two or more lines.","drawings":"Measure or read the length tag. Check orientation relative to ceiling grid. A multi-tube fitting shows parallel lines; this form shows a single tube or a generic linear fitting.","terms":[{"name":"Schematic","meaning":"A drawing showing function and connections rather than physical appearance."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"IEC graphical symbols for diagrams","url":"https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/"},{"label":"Electrical installation design methodology and references","url":"https://www.electrical-installation.org/enwiki/General_rules_of_electrical_installation_design"}],"detail":"Plan mark for a linear fluorescent or tube luminaire, a long line with short end bars drawn to the fitting length. A multi-tube fitting shows parallel lines; this form shows a single tube or a generic linear fitting.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/iec-fluorescent-luminaire","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/iec-fluorescent-luminaire.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"iec-diagrams","title":"IEC graphical symbols for diagrams","publisher":"IEC","url":"https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/","type":"standard","scope":"IEC 60617 and related symbol-design publications. Full database access requires a subscription.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"IEC graphical symbol context for installation plans; independently drawn here."},{"id":"pub-object-engineering-design","title":"Electrical installation design methodology and references","publisher":"Schneider Electric — Electrical Installation Guide","url":"https://www.electrical-installation.org/enwiki/General_rules_of_electrical_installation_design","type":"manufacturer","scope":"Public design context. No universal working clearance, equipment dimension or project compliance conclusion is asserted.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Installation design methodology covering lighting circuits and final distribution."}]}