condition	mean	min	max
4 h after light	6.49998	6.42321	6.653460000000001
8 h after light	6.7168366666666675	6.58663	6.87352
12 h after light	6.548776666666667	6.42583	6.788060000000001
4 h after dark	6.753383333333333	6.600789999999999	6.83484
8 h after dark	6.85591	6.64435	6.993119999999999
12 h after dark	6.992803333333334	6.95613	7.042960000000001