Is there any evidence F.lux and similar actually do anything other than make pretty lights? I mean, that's fine enough if that's what you want but I often hear health or sleep claims made. Are those substantiated in any way?
What do you mean? That article says the claim is false. LCD monitors emit blue light whether you want it or not anyway. Merely setting something in the OS to change the color temperature does not eliminate blue light and I don't think it even necessary changes the color temperature.
We kind of even know why, because of blue light receptors in our eyes linked to hormones released in the morning to increase alertness. This is linked to the light spectrum seen at sunrise.
