condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 2.046585 0.0 4.09317 12 h after light 1.10517 0.0 2.21034 4 h after dark 0.728235 0.0 1.45647 8 h after dark 1.0883895 0.729879 1.4469 12 h after dark 0.60499 0.0 1.20998