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 resolutions up to 16384x8192.
The HDRI was made using my scene which can be found here:
https://www.cgtrader.com/3d-models/interior/hall/warehouse-interior-4-textures
After purchase you’ll get my full support if needed.
Thank you! Have a nice day! :)