These areas can be long and need adequate lighting. Be sure to place enough lighting so shadows are not cast when walking. Remember, hallways are often escape routes in the event of inclement weather and emergencies. A hallway over 10 feet long is required to have an outlet for general purpose. Three-way switches are required for the two ends of the hallway. If there are more doors throughout the hallway, say a bedroom or two, then you may want to add addition four-way switches to the circuit outside the door of each room.