condition mean min max 4 h after light 2012.570968 1856.217572 2168.924364 8 h after light 1550.7529494999999 1394.571934 1706.933965 12 h after light 1590.2638980000002 1569.058455 1611.469341 4 h after dark 1077.3532034999998 968.617888 1186.088519 8 h after dark 660.7006175 427.425104 893.976131 12 h after dark 2025.613994 2025.613994 2025.613994