To ensure the highest accuracy for impact location measurements - there are requirements to the setup in order to get impact location measured by the TM4.
Please find attached document for best practice setup and light requirements, mainly for Indoor setups.
Further, the LED light referenced in Indoor test setup in this document was: https://www.bhphotovideo.com/c/product/1283186-REG/genaray_sp_e_500d_spectroled_essential_500_daylight.html
Please note, this specific light works well in our Indoor test environment at TrackMan headquarters, but we cannot guarantee that it will cover all possible scenarios.
If you have any questions please contact firstname.lastname@example.org
DOWNLOAD DOCUMENT IN THE BELOW LINK