When exporting to NIK or any other plug, Lightroom asks for some information.
AFAIK, and the more I study the less I know, the exported file should be a TIFF (no good options there), ProPhoto RGB (I've read that sRGB restricts the color space), 16 bits/component, and the resolution leaves me puzzled.
The file sizes seem to be the same. There should not be a downsizing involved. So ... is that just "a number" or will it have any effect at all later on?