condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0145584 0.0 0.0291168 12 h after light 0.02034085 0.0176764 0.0230053 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0