condition	mean	min	max
4 h after light	8.53345	8.30967	8.85261
8 h after light	8.519413333333333	8.3251	8.89607
12 h after light	8.54333	8.368039999999999	8.751610000000001
4 h after dark	8.60147	8.309560000000001	8.87925
8 h after dark	8.538413333333333	8.26495	8.84362
12 h after dark	8.291426666666666	8.095139999999999	8.526530000000001