condition mean min max 4 h after light 65.50595 61.453 69.5589 8 h after light 60.87625 59.7009 62.0516 12 h after light 62.14915 61.9135 62.3848 4 h after dark 106.66525 99.7535 113.577 8 h after dark 116.707 112.951 120.463 12 h after dark 98.0603 96.5266 99.594