The LightRail® Difference LightRail® moves your indoor grow lights over the tops of the plants, reducing shadow patterns and getting the correct intensity of light on the leaves for optimum Leaf Area Index – the single most important factor in increasing your yield. You’ll get much better yields plus up to 20% more area covered – with our grow equipment, you save energy and money, and with much better results. LightRail® is the single best way to Super Charge your indoor grow lights. LightRail® – solidly made in the USA since 1986.