condition	mean	min	max
4 h after light	7.658266666666667	7.5717300000000005	7.763780000000001
8 h after light	7.510366666666667	7.3254600000000005	7.64625
12 h after light	7.96572	7.891560000000001	8.01262
4 h after dark	7.9693233333333335	7.93182	7.99348
8 h after dark	7.720916666666667	7.5880399999999995	7.98239
12 h after dark	7.618460000000001	7.602360000000001	7.64376