Another bonus is lighthouses are close to the sea, which means that fishing is possible. Also, many older lighthouses were built to house people, mainly one or more lighthouse keepers and a family or two. Island Lighthouses can also be found on large plots of lands, making it possible to farm crops and raise animals.
There are many disadvantages with lighthouses. First, there are not many old lighthouses nowadays days, having been replaced with modern, smaller ones which only need a computer to run it. Lighthouses also do not have a large food store, and even those with some are very small. Some of the island lighthouses are lucky to have a farm with them but not all are supplied nowadays days. Fresh water is also a concern, unless there is a well, water tank or some means to create distilled water. Being close to the sea means constant danger of not only the undead getting washed up on the doorstep or banging at the door, but the constant danger of storms, rough seas and strong winds. This can also bring sickness from the cold and wet enviroment. Fishing can also be difficult, since many lighthouses are built by rocky shores.
The United Kingdom is one of the few exeptions to this rule, and there a few very isloated lighthouses that are only accesible via a helicopter or at low tide, these lighthouses have enough food and water to supply a single person for many months incase of problems with the helipad. Some may have a reliable supply of water depending on how important they are in the 21st century, meaning that they have access to an underground well less than a mile from the lighthouse itself, or a water purification system using sea water and a heating system. Even if they seem to rely on electricity, they have a back up generator that uses gasoline. Choosing to use one of these lighthouses is a more of a stop gap measure rather than practical choice for survival.