condition	mean	min	max
4 h after light	20.524983	19.776338	21.273628
8 h after light	17.076428999999997	16.589073	17.563785
12 h after light	16.400123	15.640372	17.159874
4 h after dark	15.563531000000001	14.693632	16.43343
8 h after dark	16.959676	16.959676	16.959676
12 h after dark	18.112676	18.112676	18.112676