condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.03549485 0.0 0.0709897 8 h after dark 0.0355749 0.0 0.0711498 12 h after dark 0.0350234 0.0 0.0700468