condition mean min max 4 h after light 4155.8 4155.8 4155.8 8 h after light 3961.75 3740.6 4182.9 12 h after light 3953.95 3731.9 4176.0 4 h after dark 4777.7 3641.4 5914.0 8 h after dark 5528.5 4868.3 6188.7 12 h after dark 5339.15 5281.2 5397.1