condition mean min max 4 h after light 10.96233 8.38546 13.5392 8 h after light 10.4905 10.2276 10.7534 12 h after light 10.04771 9.62512 10.4703 4 h after dark 16.9464 15.7723 17.6615 8 h after dark 21.664666666666665 21.0714 22.5533 12 h after dark 16.099533333333333 14.8385 17.9327