32Bit Tiff or EXR Aces CG from Cinema 4D to 16 or 8bit export without losing highlight detail

I want to save my edited tiff that was made in Cinema 4D as a png or jpeg without losing my detail in the highlights of my image. However no matter how i do the conversion it has not worked and converting the image to 16bit makes it very washed out and lose a lot of detail.