Night mode is an automatic setting which takes advantage of the new wide-angle camera that's in the iPhone 11 and 11 Pro models. It's equipped with a larger sensor that is able to let in more light, allowing for brighter photos when the light is low.
8GB iPhone Price Drop, 4GB iPhone Discontinued
With the current pricing, the 8GB iPhone is now only $100 more than the new iPod touch model at the same storage capacity.
Note: The 4GB model is available for $299 while supplies last.