condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 9 h after light 0.0 0.0 0.0 12 h after light 0.0311988 0.0 0.0935964 3 h after dark 0.0 0.0 0.0 6 h after dark 0.0877274 0.0 0.164162 9 h after dark 0.12604233333333334 0.0 0.378127 12 h after dark 0.0 0.0 0.0