condition mean min max 4 h after light 14.3357 11.5138 17.1576 8 h after light 10.2127 10.1557 10.2697 12 h after light 21.15625 20.8668 21.4457 4 h after dark 39.94555 37.3551 42.536 8 h after dark 28.88355 28.8017 28.9654 12 h after dark 24.2257 23.9786 24.4728