Stetra Photometric Studio | IES Viewer & Downlight Spacing Calculator

Stetra Photometric Studio (v4.3.1 Ver.13)

Stetra Photometric Studio (v5.1)

Upload or drag & drop an LM-63 IES file Self-tests running…

Upload an IES file

Drag file here or click to upload

Supported: .ies

Upload file

Or load a demo:

Photometric view

— Lumen/Watt

Output

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Power

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Product name

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Manufacturer

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Lamp type

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Luminaire

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Date

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Photometric type

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Symmetry

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Peak

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V angles

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Planes

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Beam angle

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Upload an IES to populate data.

Beam (demo) 40°

Mounting 9.0 ft

Output

Power

* Beam slider is disabled when an IES is uploaded (real photometry is used).

Iso-illuminance plot (fc)

Mounting height

IESNA TM-15-07 Luminaire Classification (BUG)

Rating: B— U— G—

Lumen distribution

Forward Light

Low (0–30°)

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Medium (30–60°)

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High (60–80°)

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Very High (80–90°)

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Back Light

Low (0–30°)

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Medium (30–60°)

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High (60–80°)

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Very High (80–90°)

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Uplight

Low (90–100°)

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High (100–180°)

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Total

Sum

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100%

IESNA TM-15-07 Luminaire Classification System for Outdoor Luminaires

Beam + Fixture placement

Beam intensities

* measured at center of beam

Fixture placement

More lighting tools – section

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Use these calculators for quick estimates — for permit-ready results, order a professional photometric plan.

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Quick spacing grid for recessed and ceiling-mounted lights

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Lumen Calculator

Estimate required lumens for target lux/fc.

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Chandelier Size Calculator

Fast sizing guidance for dining & living rooms.

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Cable / Voltage Drop

Check cable sizing and voltage drop limits.

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