Hi @IasonBournas,
The first file that you get is the output from Radiance rpict. This is the very bright, white image that you will get as a result. Human sensitivity is then applied to the HDR image to get a represenation of the human eye response, which gives you an image that you can visualize.
Last, the “_f” file is just a horizontal flip of the image to make the sky look as if seen from above.
The easiest way to output the falsecolor would be to run Honeybee_Falsecolor and use the first HDR image as an _HDRFilePath.
check this video from Mostapha with a nice explanation of the different skie types and their use