The product comes in full range RGB .exr, multilayer .exr and HDR formats which are the best for HDR images.
The OpenExr and HDR formats come in 3 resolutions:
8192x4096
4096x2048
2048x1024
The HDRI was made using my scene which can be found here:
https://www.artstation.com/a/5337688
After purchase you’ll get my full support if needed.
Thank you! Have a nice day! :)