condition mean min max 4 h after light 3391.5 3391.5 3391.5 8 h after light 3154.45 2579.6 3729.3 12 h after light 3236.5 3072.2 3400.8 4 h after dark 3279.75 2631.3 3928.2 8 h after dark 3598.15 2879.5 4316.8 12 h after dark 3078.15 3022.4 3133.9