condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.122328 0.0 0.244656 4 h after dark 0.0 0.0 0.0 8 h after dark 0.080077 0.0 0.160154 12 h after dark 0.0 0.0 0.0