This is not a map. This is not a world. This is a .nbt file that u have to put in the world folder, exactly at .minecraft/saves/worldname/generated/minecraft/structures/.
You have to create the last 2 folders if they arent already there
To use it just get a structure block and go in "Load" mode, then write "lightningarrowstructure" (name may be different, its the name of the file without ".nbt") then click "load" once to prepare it, and another time to create the machine. This works by pressing the lever to activate it, and then read the book inside the chest that i prepared. Have fun killing stuff with lightning arrows!