condition	mean	min	max
4 h after light	6.978933333333334	6.77849	7.154260000000001
8 h after light	6.93948	6.68502	7.153989999999999
12 h after light	6.73178	6.6077699999999995	6.92163
4 h after dark	6.906923333333333	6.67413	7.16736
8 h after dark	7.062373333333333	6.89359	7.29673
12 h after dark	6.93742	6.78344	7.042110000000001