Meduza Photometric Analyzer can handle IESNA LM-63 and EULUMDAT file formats. These file formats are text documents that are easy to read with e.g. Windows Notepad, but requires a complex application to display and evaluate them. The application is designed to perform this tasks.
The IESNA LM-63 file extension: * .ies
EULUMDAT file extension: * .ldt
You can read more about file format requirements and structure on the website as well.