Additional FeaturesChain driven design is simple and reliable Have more uniform growth and development in your plants with the Hydrofarm Light Track System. Eliminating shading, this light track system slowly moves back and forth along its length, mimicking the sun, and takes about 20 minutes to travel 6-feet. Featuring a Swiss-made motor, this light track system has a chain driven design which is simple and reliable. About Hydrofarm, Inc. Celebrated as the nation"s oldest and largest manufacturer of hydroponic equipment and grow lights, Hydrofarm has made professional-grade equipment available to all since 1977. All grow lights and electric components are UL listed, unlike many competitors" products, meaning you get years of reliable and safe use out your high-intensity lights. All products are covered by a one year warranty, at the least. In some cases Hydrofarm ensures the performance of their products for five years. Allows for more uniform growth and development. Eliminates shading. Slowly moves fixture back and forth along its length. Takes about 20 minutes to travel 6-feet. Features a Swiss-made motor. Package measures 49.3L x 5.6W x 2.3H.