condition	mean	min	max
4 h after light	664.1	664.1	664.1
8 h after light	636.35	581.0	691.7
12 h after light	498.6	496.7	500.5
4 h after dark	410.2	400.5	419.9
8 h after dark	269.55	176.5	362.6
12 h after dark	173.85	171.7	176.0