condition	mean	min	max
4 h after light	657.2	657.2	657.2
8 h after light	602.65	543.8	661.5
12 h after light	590.0	554.5	625.5
4 h after dark	591.85	550.2	633.5
8 h after dark	572.0	558.4	585.6
12 h after dark	630.95	568.4	693.5