How to open MYD and HAAS files for lighting photometric tests

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If you've worked around LEDs and LED lights for awhile, you've undoubtedly come across lighting photometric reports.

If you have any files that end in .MYD or .HAAS, you will need special software to open these files.

What is an MYD file? How do I open an MYD file?

MYD files are encoded text files that are used by Everfine to package LED lighting photometric report results.

MYD file formats are frequently used for individual LED tests (at the package level).

MYD files can be opened using Everfine LEDspec. You can find the download link here:

How do I install LEDSpec?

Simply download the file above and install the program into your Windows PC.

All MYD files on your computer should not have the LEDSpec icon. Double click the file and LEDSpec will open your MYD file.

What is a HAAS file? How do I open a HAAS file?

HAAS files are text files encoded to compile LED lamp test results. These files are typically the result of photometric tests from Everfine's HAAS series spectroradiometers.

HAAS files can be opened using Everfine's HAAS Suite software. You can download the software here:

How do I install HAAS Suite?

HAAS suite must be installed manually.

After downloading the ZIP file above, unzip and extract the contents into your Windows PC's Program Files folder (typically in the C drive).

Right-click on a HAAS file and choose [Open with...] and then click on [More apps] followed by [Look for another app on this PC].

Then, navigate to the folder in which you placed the HAAS Suite program files, and select HaasSuite.exe.

Your file should open automatically.

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