Make `brightness` a field of PixelTester
Make `brightness` a field of PixelTester

rec/BiblioPixel,rec/BiblioPixel,ManiacalLabs/BiblioPixel,ManiacalLabs/BiblioPixel,ManiacalLabs/BiblioPixel,rec/BiblioPixel,ManiacalLabs/BiblioPixel,rec/BiblioPixel