condition mean min max 4 h after light 8.7639545 8.319851 9.208058 8 h after light 6.8047205 6.700086 6.909355 12 h after light 8.2250115 7.967246 8.482777 4 h after dark 7.7109755 7.591218 7.830733 8 h after dark 7.7750140000000005 7.761947 7.788081 12 h after dark 8.046775 8.046775 8.046775