The 'Brightness' option provide three brightness level, includes 'Low', 'Default' and 'High', which can help you control the brightness of the output file, so if your photo is bright, you can make it darker, or if your source photo is dark, you can make it more brighter.
The tool will try to maintain the image quality of the source NEF file and create a high quality JPG file as much as possible. This free NEF to JPG converter can help you convert NEF (Nikon Electronic Format) image to JPG (JPEG Image) image.
