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 0.028579 0.0 0.114316 3 h after dark 0.0 0.0 0.0 6 h after dark 0.19100666666666666 0.0 0.57302 9 h after dark 0.040523333333333335 0.0 0.12157 12 h after dark 0.315858 0.102932 0.528784