condition	mean	min	max
4 h after light	7.60898	7.442589999999999	7.73053
8 h after light	7.534463333333334	7.2976600000000005	7.7129199999999996
12 h after light	7.5116233333333335	7.38295	7.6471100000000005
4 h after dark	7.703116666666666	7.46627	7.96152
8 h after dark	7.917683333333334	7.73895	8.1373
12 h after dark	7.8888	7.7296	8.18402