condition	mean	min	max
4 h after light	15.830950000000001	13.6151	18.0468
8 h after light	14.50995	13.3054	15.7145
12 h after light	16.86235	15.4021	18.3226
4 h after dark	20.5647	18.6803	23.0989
8 h after dark	21.6359	21.2576	22.2085
12 h after dark	18.5137	17.9379	19.4306