You can customize your rail lights in many ways. First, the run can be determined by you in setting the adjustable Switch Stops anywhere along the rail.
Note: You don’t want to move your indoor grow light too far or plants are waiting too long for the grow light to come back. Moving just 3-4 feet from switch stop to switch stop for larger grow lights or less for smaller grow lights might be just right.
Note: For smaller spaces, the extruded aluminum rail can be easily cut for fitting more exactly, or you can simply use half a rail instead of the full rail.
You can also customize the 0 – 60 second time delay knob (see photo) and this will equal out the light time that your plants will have with your grow equipment. Try a setting of 30-35 seconds for a 4′ switch stop to switch stop setting and feel free to experiment.