And because (a) blue light causes your eyes to become bright-adapted, ruining your night vision, (b) blue light is incredibly distracting in your peripheral vis

And because (a) blue light causes your eyes to become bright-adapted, ruining your night vision, (b) blue light is incredibly distracting in your peripheral vision causing massively more glare than "warmer" light sources, (c) blue light screws up circadian rhythms for people and wildlife.