I've heard that some painters favored "north light". I suppose that this is light coming from the north, but what is so special about it? If I live somewhere where the literal north light is blocked ...
From this answer on white balancing a LED light I understood there's a thing called Colour Rendering Index (CRI). I understand it has something to do with how well lights reproduce the sun's colour ...
The more I read about this, the more confused I become. Illuminance, as I understand it, measured in lux, is the perceived brightness of light on a surface. It's what you'd measure with an incident ...