condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.036053 0.0 0.108159 4 h after dark 0.0 0.0 0.0 8 h after dark 0.040288 0.0 0.120864 12 h after dark 0.0 0.0 0.0