One of the primary drivers of melatonin suppression is the IPRGC [1]. So yes, what seems to be more important than the perceived color is the intensity of light

One of the primary drivers of melatonin suppression is the IPRGC [1]. So yes, what seems to be more important than the perceived color is the intensity of light in the 460-480 nm range. Which, if the spectral data in the original post are correct, means that NightShift has a major disadvantage. [https://en.wikipedia.org/wiki/Intrinsically_photosensitive_retinal_ganglion_cells https://en.wikipedia.org/wiki/Intrinsically_photosensitive_r...]