Photographer Michael Clark compares the ProPhoto RGB space used in Lightroom to Adobe RGB and sRGB, and explains the impact of the various spaces on exporting photos.
Michael Reichmann of Luminous-Landscape.com explains the advantages of ProPhoto RGB and provides visual comparisons of the gamut of ProPhoto vs. other color spaces.
In this part of a multi-step tutorial on the Develop Module, Scott Kelby explains which file format to use when. Adapted from The Adobe Photoshop Lightroom Book for Digital Photographers.