Designed to work with the latest version of X-Plane; add native light bulbs to brighten X-Plane lights visible at greater distance and increasing lights quantity. It is very frame rates friendly; work with all versions of X-Plane. Lights bulbs are only visible at night and disappear in the day. Version 3 also add 'emergency lights' along roads to simulate emergency services night action scattered all over the the covered area. NightXP Usa Pacific cover Hawaii and Alaska.