LTL File Extension
DIALux Luminaire Data
- File Type ltl
- Developer DIAL GMBH
- Popularity
- Application DIALux
- Category Data Files
What is a LTL file?
DIALux Luminaire Data, identified by the LTL extension, is a Data Files type and includes 6196 files.
With the creation of the DIALux Luminaire Data (LTL), DIAL GMBH introduced file format along with programs built for their use.
LTL files are supported by Windows. You can open a LTL file using one of 2 programs, for example DIALux and LITESTAR 4D Photoview.
How to open a LTL file?
The most common reason why a LTL file cannot be opened is the absence of required software. To fix this, select a compatible program from the list. Then visit the official developer website via the provided link, download the program, and install it on your system.
The most popular programs for working with LTL files are DIALux and LITESTAR 4D Photoview. To get the latest version of DIALux, open the DIAL GMBH website where a universal installer for all operating systems is available.
Once setup is done, your operating system should assign DIALux as the default app for LTL files.
Make DIALux the default LTL viewer
Changing the default program in Windows
- Start by right-clicking on your LTL file and selecting the "Open With" option. From there, click "Choose another app" to continue;
- Inside the popup window, scroll through the list of applications and specifically choose DIALux as the application to associate with your LTL file;
- Check the "Always use this app" checkbox and click "OK".
Change the default app to open files on Mac
- Right click or use Control + Left Click on the desired LTL file to access a dropdown menu of actions;
- Select "Open in application" and click "Other";
- Scroll down to the bottom of the window, where you will find the "Enable" menu. Default, "Recommended Programs" will be selected;
- In this menu, choose "All Programs" and navigate to DIALux. Check the box next to "Always open in app" to make it the default program.
How to edit a LTL file?
To edit LTL files, you need to install specialized software that allows you not only to open but also to modify data files. Online LTL editors usually provide fewer features than software created specifically for DIALux Luminaire Data.
List of Top LTL editors 2026
Following these criteria, we have put together a list of recommended LTL editors.
| LTL Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| DIALux | DIAL GMBH | Windows | 4.8 out of 5 (37 reviews) |
Finding answers to LTL file problems
If you encounter issues with LTL files, don’t worry—most can be fixed with minor software adjustments. Refer to the troubleshooting tips below.
What are the signs that my LTL file is damaged?
Corrupted LTL data files may have one or more of the following symptoms:
- Poor performance when editing a file in DIALux;
- Opening or processing the file in DIALux or other programs causes instability or crashes in the program;
- The file shows errors when trying to open it or does not open completely;
- Unexpected expansion of the total size of the LTL file;
- Working with the file triggers the display of error messages;
Why does DIALux quit or crash unexpectedly?
DIALux crashes can be attributed to outdated software. Make sure you have installed the latest updates for DIAL GMBH products.
A computer restart is often the key to solving numerous common problems. That’s why, it is recommended to restart the computer before making any changes to the software settings.
What methods can be used to repair a damaged LTL file?
Use a recovery program to open the damaged LTL file and navigate to the "Repair" menu item. Wait for the recovery process to finish, as it will automatically repair damaged data files.