Awesome points and I whole heartily agree with that assessment. This is part of the reason I wanted to discuss this topic to see what others think and how best to render those values. I don’t want people to get lost in the main goal and that is regardless of LUX, Candles, etc.
My expectation is to see the value provided by the Sky. In turn someone really smart and creative like Brian can relay that same value into what ever display method. For me seeing a Sun / Moon lighter vs darker makes sense keeping in mind the LUX value would be displayed for the user. So in time a person could relate what ever value to the image they see.
Having more choices is great and if Brian decides to go one direction vs WF vs Other great!