condition	mean	min	max
4 h after light	8.37956	7.88732	8.8718
8 h after light	6.0041	5.64421	6.36399
12 h after light	5.76414	5.66598	5.8623
4 h after dark	6.50901	6.47792	6.5401
8 h after dark	7.592755	7.44356	7.74195
12 h after dark	7.97553	7.87182	8.07924