As I understand it, it isn't so much less light or warmer light as much as it is a lack of blue light. The amount of blue light during the day time in the sun

As I understand it, it isn't so much less light or warmer light as much as it is a lack of blue light. The amount of blue light during the day time in the sun is huge. F.lux works by reducing the color temperature which greatly reduces the amount of blue light coming from the display and shifts it to red light.