IESDesk edits, charts and checks IES and LDT files in the browser. It is free, and it is still in beta. Open it at iesdesk.com.

Emre Güneş built it. He tells that story in Photometric files were always the slow part. So I built IESDesk..

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Without an account

Open one file at a time, or compare two or three.

  • IES View: key figures, metadata, diagrams and a 3D view
  • LDT View: key figures, metadata, diagrams and a 3D view
  • Diagrams: four diagrams in the Minimal style (polar, Cartesian, cone and isolux)
  • BUG Rating: backlight, uplight and glare of one file
  • ULOR: the upward light output ratio of one file
  • UGR Table: the standard UGR table of one file
  • Report sheets: a one-page report sheet (PDF) for one file
  • Compare: two or three luminaires side by side
  • Lighting Scenes: wall, open area, street, bollard, room and corridor previews, with lux readings and a 3D view
  • Learn: guides to photometric files

With a free account

A free account takes up to 100 files per batch or job. Sign up with your work email.

  • Edit: metadata across all files, IES and LDT in one drop
  • Diagrams: Minimal diagrams in one ZIP file for each format
  • BUG Rating: every file in one CSV file
  • ULOR: every file in one CSV file
  • Report sheets: every file in one ZIP file
  • Your files: every batch and download, kept for 30 days