condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 9 h after light 0.0 0.0 0.0 12 h after light 0.064688 0.0 0.194064 3 h after dark 0.0 0.0 0.0 6 h after dark 0.078034 0.0 0.234102 9 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0