From Pluto, the Sun is point-like to human eyes, but still very bright, giving roughly 150 to 450 times the light of the full Moon from Earth (the variability being due to the fact that Pluto's orbit is highly elliptical, stretching from just 4.4 billion km to over 7.3 billion km from the Sun). Nonetheless, human observers would find a large decrease in available light: the solar illuminance at Pluto’s average distance is about 85 lx, which is equivalent to an office building hallway’s illuminance or a toilet’s lighting.