The Big City Rail System is a modular overhead lighting suspension system which can be expanded or modified to your wish. It offers precise positioning of lights or reflection devices with ease and speed, eliminating the clutter of light stands and power cables on the floor. The systems utilize a combination of rails, carriages, rail extenders, and manual spring/cable assisted pantographs. This is a progressive sky rail system from basic. Rail extenders enable you to modify your rail system size when necessary.