IES File Reader -

An IES file is a text-based photometric data file that describes exactly how a light fixture distributes light in three dimensions — every angle, every candela value. Manufacturers publish these files for every fixture they make, and lighting designers, architects, and electrical engineers use them to plan layouts with precision.

Most IES viewers are expensive desktop software or clunky online tools that require sign-ups. Our free IES file reader works entirely in your browser — your file is never uploaded to any server. Just drag and drop your .ies file to instantly see the polar plot, beam angle, lumen output, efficacy, and full photometric data.

Download IES files free from any major lighting manufacturer’s website — search for your fixture model followed by “photometric data” or “.ies file”.

IES Photometric Analyzer

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Drop an IES file here

Drag & drop a .ies photometric file — processed entirely in your browser, never uploaded

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Total lumens

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lm/W efficacy

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Peak candela

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Beam C0 / C90

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Field C0 / C90

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Input watts

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Fixture type

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Edge softness

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Uniformity

Polar intensity distribution

Side elevation

📏 Coverage projection

Mounting height: above work plane

Height	Center lux	Avg beam lux	Center fc	Beam Ø C0	Beam Ø C90	Field Ø C0

Beam and field diameters use C0 and C90 data when available. For asymmetric photometry, use these as quick estimates rather than a full AGi32/DIALux replacement, because apparently reality insists on being three-dimensional.