File Extension Database

Open LDT File

The file with the LDT extension contains useful photometric data for any device or software specialized in designing lighting installations.

LDT files are generally created and supplied by manufacturers of lighting products. LDT files store data for a given fixture, for example:

Light distribution curve.
Light intensity.
Luminaire size.

LDT files are directly related to Eulumdat Formatted Luminaire Data File which were originally developed by DIAL for the DIALux LDT Editor software application.

DIALux software is used for design, calculate and visualize light for single rooms, whole buildings, streets, outdoor areas and daylighting.

DIALux evo 9.2

How Can I Open LDT File on Windows

We researched and learned that the best way to open LDT file is to find a LDT file in question in Windows OS File Explorer and double click on it to launch the corresponding application.
If a LDT file is not opened in an application and you instead get a "Windows can't open a file" error message you should try looking for an application which can open the file in question.
If you know the application which can open LDT file then run it and see if there is a File->Open main menu option in the application.
If you don't know the application which function as LDT file opener then try to search online for "LDT viewer", "application to open LDT file" or "open LDT file" queries in the search engine you like.
Install the application you found and check if it can open LDT file

How Can I Open LDT File on Mac OS

We recommend to find a LDT file in question in Mac OS Finder and double click on it to launch the corresponding application.
If a LDT file is not opened in a Mac OS application and you instead get a "There is no application set to open the file" error message you can click on "Search App Store" in the error dialog and Mac OS will show you applications compatible with LDT file.
If you know the Mac OS application which can work as LDT file opener you can choose the "Choose Application..." option in the error box to associate the file extension and open LDT file in it.
If you don't know the application which can open LDT file then try to search for "LDT viewer", "application to open LDT file" or "read LDT file" queries in the online search engine you like.
Install the application you found and check if it can read LDT file

How Can I Open LDT File on Android

If you downloaded a LDT file on Android device you can open it by following steps below:

In the Android apps list on your Android device find "My Files" or "File manager" app and tap to start it.
Tap on "Downloads" folder inside the app.
You should see your downloaded LDT file in that folder.
Tap on the file. If Android device supports opening the file you downloaded it will open in the corresponding app.
If file does not open you can look for the corresponding app that can open the file by searching Android App Store for the "LDT".
If you cannot open the file with the apps from Android App Store it is possible that the file could only be opened on desktop platforms such as Windows or Mac OS. Try searching for "LDT viewer", "LDT file reader" online and see if any desktop applications can open it.
It is also possible that the file you downloaded is outdated and is no longer supported.

How to Open LDT File on iPhone or iPad

To open LDT File on iOS device follow steps below:

We advies to open Files app on your iPhone or iPad device. You can find it by swiping down on the home screen and typing "Files" in the search bar.
Tap on the Downloads folder on the Files app home screen.
You will see all files that you recently downloaded. Tap on the LDT file to view it.
If you have the right app that can open it it will automatically launch and open your file.
If you don't have the app which can open it you need to serch Apple app store for "LDT". This way you can find apps which can open LDT files.
If this doesn't help it is possible that your file could be opened only by the desktop application. To find an app which can open it on desktop look for "LDT viewer" or "LDT file" online in your favorite search engine.