Gualala Light Rail 3.5 light movers are ideal for rectangular growing areas where one light is "just not enough" or two lights would normally be used. The 3.5 can scale down to fit even the smallest garden. Customers love the scalability, power savings and service. Gives more control over individual lights, running on different seasons. It uses no pulleys, chains or gears. The Light Rail 3.5 Intelli Drive is supplied with adjustable switch stops, so lamp travel can be any length you wish. This is perfect for a start-up size garden through to a full growth garden. The standard 6 foot track may also be extended.