condition mean min max 0 h after light 15.9864 15.1111 16.8617 4 h after light 6.929765 6.63143 7.2281 8 h after light 7.085975 6.54886 7.62309 4 h after dark 12.8842 12.1226 13.6458 8 h after dark 12.8387 12.3039 13.3735 12 h after dark 14.725950000000001 12.6428 16.8091