condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0220091 0.0 0.0440182 4 h after dark 0.06387225 0.0424696 0.0852749 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0