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 0.290976 0.0 0.457546 12 h after light 0.0 0.0 0.0 3 h after dark 1.2224483333333334 0.50842 2.49 6 h after dark 0.4274 0.0 1.2822 9 h after dark 0.613785 0.0 1.0253 12 h after dark 1.877311 0.747163 3.30871