IESNA LM-63-2002
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Live light preview
IES file generator
Build an approximate photometric IES (IESNA LM-63) file for a luminaire: set the power, luminous flux and size, pick a light-distribution curve and the spot symmetry, preview it in a live 3D room and download the .ies file.
Free, ready-to-embed IES generator — pick a style and your brand color, copy the snippet, done. It loads in an iframe, so it never clashes with your page styles.
Style and color apply to the tool right below — what you see is what the embedded widget looks like.
Light in the room
Drag to rotate
Intensity curve
C0 — along
C90 — across
Max on floor
—lx
Average
—lx
Uniformity Emin/Eavg
—
50% spot
—m
Plain-text LM-63-2002 file — opens in DIALux, Relux, AGi32 and BIM tools.
How the file is built
Parametric photometry
The intensity curve comes from a cos^n model: the beam angle you set becomes the exponent, so half the peak intensity falls exactly on the half-angle you asked for.
Normalised to your flux
The curve is scaled so that the integral over the full sphere equals the luminous flux you entered — the file carries your lumens, not an arbitrary peak value.
Spot symmetry
Axial writes one C-plane; linear writes C0 and C90, with the beam narrower along the body and wider across it — an elongated spot, as a real linear luminaire gives.
The preview is the file
The room and the diagram are drawn from the very same curve the server writes into the .ies — the picture cannot drift away from the downloaded file.
Important
This produces an approximate photometric file from a parametric model — useful for quick studies, mock-ups and testing. It is not a measured laboratory (goniophotometer) file and should not be used for certification or as a real product datasheet.