About LIV - Light Intensity Viewer
LIV is a progressive web app (PWA) designed by Wagyx Xygaw (the human) assisted by Claude (the AI).
This app will display the light photometric data in ANSI IES and EULUMDAT formats as well as
the rayset data in Speos, IES TM-25, ASCII, Zemax and Lucid Shape formats.
For raysets, the rays are integrated into an intensity profile using the inclination and azimuth resolution set when loading the file.
The plot diagram, the 3D view and the scene render are based on the intensity profile.
Using Chrome, Edge, or Safari, you can install it on your mobile or desktop by clicking on the install button on the top.
With Chrome, an icon should appear on the right side of the address bar.
This app does not track you nor collect any data whatsoever. It is also ad-free.
If you have any feedback (reporting a bug, asking for more format support, etc...), please
contact me ✉.
Copyright © 2025 Wagyx Xygaw - All rights reserved.
References
- IES Library A collection of IES/LDT files from various sources.
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ANSI/IES LM-63-19 Approved Method: IES Standard File Format for the Electronic Transfer of Photometric Data and Related Information
- EULUMDAT Data Format for Exchange of Luminaire Data
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ANSI/IES TM-25-20(R25) Technical Memorandum: Ray File Format for the Description of the Emission Properties of Light Sources
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CIBSE TM14 Standard File Format for Transfer of Luminaire Photometric Data