All about IGF Files

The IGF file type is primarily associated with DIALux evo.

IGF	File extension: IGF
	File type:	data file

What is an IGF file?

IGF files mostly belong to DIALux evo. IGF files serve a specialized role in professional environments. They are used to store detailed test data for two main purposes:

Lighting Test Reports – These files are used by DIALux evo. They record measurement details and simulation parameters for photometric evaluations under the Photoluminescent Design & Analysis (PLDA) process. This information helps validate light distribution and intensity. For more guidance, visit the DIALux website.

HVAC Data Files – In some cases, IGF files log trend data for heating, ventilation, and air conditioning systems. This data may include sensor readings and performance logs, and is handled by software such as TrendXpert or TrendReader.

FilExt.com tip: These files are built in a custom format. They are not meant to be edited with simple text tools and must be opened with the authorized software.

How to open an IGF file

You need a suitable software like DIALux evo to open an IGF file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your IGF file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a IGF file directly in the browser:. Just drag the file onto this browser window and drop it.

Online IGF Text Viewer

Choose your .igf file to view

or drag and drop it here

Online File Viewer

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How to extract texts from IGF files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

1. To do this, click the button "Choose your .igf file to view" on this page.
2. Your IGF file will then be displayed in the browser.
3. Now click on "Save as..." at the top of the page.
4. Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
5. Download the converted file.

IGF file format:

To view or edit IGF files you need to know the file format, because it determines how the data in this file is stored. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). However, different programs can use the same file extension, and file extensions can be assigned incorrectly. Knowledge is power - this also applies when dealing with unknown or faulty files. Our examination of the IGF files comes to the following conclusion:

IGF is rarely used as a file extension and includes various formats for various programs. The file formats most commonly found in IGF files are:

• 55% of all IGF files start with the magic bytes [Predefined Infos] TEST = , which are always the first bytes of this file format. The contents of these files can even be read by a human. A typical file size is 27 KB. The file type is relatively new. The following keywords are characteristic: [Predefined Infos], LUMENSPERLAMP =, LAMPCAT =, LUMCAT =, LAMPNUMBER =, ISSUEDATE, MANUFAC =, HEIGHT =, LENGTH =, WIDTH =, TEST =, LUMINAIRE = and TESTLAB. Such files sometimes refer to alaska.
• 6% of all IGF files use the same file format, which have the signature 73 E1. If you open these files in a text editor, you will see only illegible characters. IGF files are between 1 KB and 950 KB in size.

The remaining 39% of all IGF files are files with no common format. They are often associated with data. If you want to find out what your IGF file contains, drag and drop it onto this page.