condition	mean	min	max
4 h after light	6.483406666666666	6.33695	6.5927
8 h after light	6.535583333333333	6.48834	6.568219999999999
12 h after light	6.656499999999999	6.55505	6.74488
4 h after dark	6.58029	6.4459599999999995	6.72733
8 h after dark	6.47908	6.44156	6.5206800000000005
12 h after dark	6.375473333333334	6.26789	6.46464