I understand the wait, sounds like you are level headed and investigate stuff before you buy. Good attitude and you'll do better this way. I do believe the low weight limit is due to the chain they use. Pretty slim whereas the Light Rails's much more heavy duty. Then again, it is double. The Hydro Farm (in a sense) has a delay also (not adjustable) because when it reaches one of the ends, it takes about 2 minutes for the guide arm to go around the gear and then it moves in the opposite direction. This delay doesn't seem to have much time difference. The Light Track has a beefier high-torque motor in it and together, with the heavier duty construction, it should last quite awhile. If I had the bucks, I'd definitely get the Sola Rola, but that is another discussion. That brand is for the rich retired guys, not us workin' fools! About the biggest advantage I see is that any form of "light mover" is going to let you bring the reflector closer to the canopy. That's the real deal. Incidentially, there is a neat light mover for LED's made by Kessil. They have 150 and 350 Watt Grow Lights in 4 color spectrums and their "Spectral Spinner" holds UP TO 6 of them! One can mix colors and wattage to achieve optimal results. If one started with two Grow lights AND the Spectral Spinner, the cost is about the same (depending on your source) as a HID set-up (Reflector, Ballast & Bulb). Can see at Hydro farm .com