condition	mean	min	max
4 h after light	6.316826666666667	6.11417	6.6437800000000005
8 h after light	6.290603333333333	6.00917	6.4429099999999995
12 h after light	6.11666	5.87028	6.33739
4 h after dark	6.13606	6.025919999999999	6.2088
8 h after dark	6.1443	5.956869999999999	6.3532
12 h after dark	6.3417666666666666	6.20601	6.53948