condition mean min max 0 h after light 0.0 0.0 0.0 2 h after light 0.0 0.0 0.0 4 h after light 0.083939 0.0 0.167878 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 2 h after dark 0.0 0.0 0.0 4 h after dark 0.0824035 0.0 0.164807 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0