I know this has been asked. I understand that ran is past and run is perfect past tense. However, I am still somewhat confused on what is correct in this case:

"This report section contains data for 25 units ran at X and Y conditions" or "This report section contains data for 25 units run at X and Y conditions"

Thanks in advance.

I know this has been asked. I understand that ran is past and run is perfect past tense. However, I am still somewhat confused on what is correct in this case:

This report section contains data for 25 units ran at X and Y conditions

or

This report section contains data for 25 units run at X and Y conditions