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Every tool for your IES and LDT files, for one file or hundreds.

Try most tools on one file with no account. Sign up free with your work email to use it on hundreds of files at once.

Edit metadata

Change the product name, the catalogue number, the manufacturer and the other header text in hundreds of IES or LDT files at once. Edit in a table, or download the text as a CSV or Excel sheet, change it there and upload it again. You get one ZIP file with the edited files. IESDesk checks each file before the download, and the light data stays as measured.

See the metadata of one file, no account: IES View, LDT View

Many files: Sign up free

Diagrams

Draw polar, Cartesian, cone and isolux diagrams. Choose the diagrams, the colours and the image type: SVG, PNG or JPG, up to 300 dpi. You can make your own colour theme. You get one ZIP file with the images of every file. IESDesk emails you when the diagrams are ready.

Polar intensity diagram, C0–C180 and C90–C270Peak intensity 300 cd/klm at gamma 0 degrees. The outer ring is 300 cd/klm.0°30°30°60°60°90°90°120°120°150°150°180°100200300cd/klmC0–C180C90–C270
Polar: the strength of the light in each direction.
Cartesian intensity diagram, C0–C180 and C90–C270Peak intensity 300 cd/klm at gamma 0 degrees. The top line is 300 cd/klm.-180°-150°-120°-90°-60°-30°0°30°60°90°120°150°180°100200300cd/klmC0–C180C90–C270
Cartesian: the same values on straight axes.
Cone diagram, beam angle 40.0°At 1 m: diameter 0.73 m, 2000 lux. At 2 m: diameter 1.46 m, 500 lux. At 3 m: diameter 2.18 m, 222 lux. At 4 m: diameter 2.91 m, 125 lux. At 5 m: diameter 3.64 m, 80 lux.HeightDiameterCentre40.0°1 mØ 0.73 m2000 lx2 mØ 1.46 m500 lx3 mØ 2.18 m222 lx4 mØ 2.91 m125 lx5 mØ 3.64 m80 lx
Cone: the light on the floor at each height.
Isolux diagram at a mounting height of 4 mIlluminance below the luminaire: 125 lux. Contour lines at 100, 50, 20, 10 lux. Direct light only.-4-4-3-3-2-2-1-10011223344metres100100505020201010Mounting height 4 m · lux · Direct light onlyC0
Isolux: lines of equal light on the floor.

One file, no account: Diagram

Many files: Sign up free

3D view

See the light of one file in 3D, in real light or in false colour. Turn the view to see the light from each side.

One file, no account: IES View, LDT View

BUG Rating

Rate the backlight, uplight and glare of a luminaire against ANSI/IES TM-15-20. Rate hundreds of files and get one CSV file, with one row for each file.

One file, no account: BUG Rating

Many files: Sign up free

ULOR

Calculate the upward light output ratio: the share of the lamp light that goes above the horizontal. Get one CSV file for hundreds of files.

One file, no account: ULOR

Many files: Sign up free

Report sheets

Make a one-page PDF report sheet for a file, with its diagrams and its main values. There are three sheets: area and road, floodlight, and indoor. With an account, add your logo, your company name and a footer line. Then make sheets for many files at once, also from files you edited, and get one ZIP file. IESDesk emails you when the sheets are ready.

One file, no account: Report

Many files: Sign up free

Upload a whole folder

Drop a folder. IESDesk takes the IES and LDT files from the folder and from every subfolder, and lists each file that it leaves out.

History and downloads

Your uploaded files and your downloads stay for 30 days. You can delete the files of an edit batch earlier.

Learn

Guides to IES and LDT files, their dimensions and their diagrams. Read the guides.

IESDesk is free.

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