condition	mean	min	max
4 h after light	6.94316	6.81335	7.03112
8 h after light	6.769983333333333	6.63772	6.8558
12 h after light	6.864976666666667	6.717280000000001	7.08374
4 h after dark	6.846493333333334	6.592210000000001	7.06026
8 h after dark	6.781269999999999	6.584289999999999	7.12558
12 h after dark	6.87286	6.68253	7.01697