LDT to IES Converter

Convert LDT files to IES format online with accurate photometric data preservation. Simple upload and download process.

Request Feature / Support

8,316+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

AI Web Tool Generator

Build Your Own Custom Web Calculator in Seconds

Type what tool or calculator you need below. Our AI will build it instantly for your site.

About This Tool

This online tool allows lighting designers and engineers to convert LDT (Lucid Design Tool) files to IES (Illuminating Engineering Society) format quickly and accurately. The converter preserves all photometric data including intensity distribution, luminous flux, and angular measurements. The tool handles the complex data mapping between LDT's proprietary format and the standardized IES format used in lighting simulation software. No software installation or registration required - simply upload your LDT file and download the converted IES file instantly.

Save your calculation history with a free account

How to Use

Click the upload area or drag & drop your LDT file (.ldt extension)
Select conversion options if needed (default settings work for most cases)
Click the 'Convert to IES' button to start the conversion
Wait for processing to complete (usually takes a few seconds)
Download your converted IES file from the results section
Use the IES file in your lighting simulation software like Dialux, Relux, or AGi32

Frequently Asked Questions

Find Quick Answers

What is the difference between LDT and IES files?

LDT files are proprietary format used by Lucid Design Tool for storing photometric data, while IES files are a standardized format (IESNA LM-63) used across the lighting industry for sharing photometric data between different software applications.

Does the converter preserve all photometric data?

Yes, the converter accurately maps all photometric data including candela values, luminous flux, photometric type, and angular measurements from the LDT format to the IES standard format.

What is the maximum file size I can convert?

The tool supports LDT files up to 10MB in size, which covers most standard lighting fixture photometric files. Larger files may require professional software.

Can I convert multiple files at once?

Currently, the tool supports single file conversion. For batch processing, you would need to convert each file individually or use professional lighting design software.

What software can I use the converted IES files with?

Converted IES files are compatible with all major lighting simulation software including Dialux, Relux, AGi32, Visual Lighting, and many CAD programs that support IES import.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

Related Tools

Other useful calculators and utilities you might like

Spotify to MP3 Converter

Convert Spotify tracks and playlists to MP3 format instantly with our free online converter.

Road Distance Calculator

Calculate the driving distance and travel time between two addresses with our free online road dista...

Age Calculator

Calculate your exact age in years, months, and days from any birth date to any target date.

Currency Converter

Convert currencies instantly with real-time exchange rates and historical data support.

Your Feedback Matters

Help Us to Improve