condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0836649 0.0 0.22639 12 h after light 0.0 0.0 0.0 4 h after dark 0.059834 0.0 0.179502 8 h after dark 0.0561303 0.0 0.120309 12 h after dark 0.1150395 0.0 0.28187