LightRail motors are solidly constructed and built to move your grow lights for years to come. Knock-off grow light movers are not built to the same high standards of Gualala Robotics’ LightRail Systems. LightRail light movers are built for the task at hand – your success with growing. Sadly, knock-offs are built with just one purpose – to look like LightRail. Don’t be fooled by imitations.