Documentation

Full user guides for DL-Light and DL-Instant, with dedicated editions for Windows and macOS. Step-by-step workflows, metric definitions, standards references and troubleshooting.

Open the DL-Light Guide →

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Choose Your Guide

DL-Light for Windows documentation

DL-Light for Windows

Complete reference for the Windows edition: DF, DA, sDA, ASE, UDI, EN 17037, VSC, APSH, NSL, Sky Factor, Watt/m², solar exposure and more.

Open Windows Guide
DL-Light for macOS documentation

DL-Light for macOS

macOS-specific edition of the user guide, covering the same metrics with notes on Apple Silicon and Intel installations.

Open macOS Guide
DL-Instant documentation

DL-Instant

Documentation for DL-Instant — the fast, interactive lighting and rendering companion for SketchUp on Windows with glare analysis.

Open DL-Instant Guide

Quick Links

Metrics Overview

Browse every daylighting metric supported by DL-Light, with definitions, applicable standards and recommended thresholds.

See Metrics

Release Notes

Track new features, bug fixes and standards updates across every published version of DL-Light.

View Release Notes

CIE 171:2006 Validation

Read how DL-Light's solver was validated against the CIE 171:2006 reference test cases.

See Validation

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Contact our team for licensing, installation or project-specific questions.

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