condition	mean	min	max
4 h after light	6.632086666666667	6.1527	6.90773
8 h after light	6.91385	6.50595	7.153460000000001
12 h after light	7.214553333333334	6.9216	7.431660000000001
4 h after dark	7.40599	7.08552	7.56975
8 h after dark	7.413743333333334	7.0942	7.642119999999999
12 h after dark	7.242513333333333	6.85561	7.6310199999999995