Actually I just learned that they are a lot lighter than they look and im sure it could support it. Its wierd that I havent seen anyone using a light mover on here.
i have one. yes dude is correct ...no weight at all ...you can do it easy.
the weight = till you add the light.
remember air cooling is a PIA with a moving light.
attach the rail with a few small sheetrock type screws to a 1x3 piece of wood... leave extra wood at the end & secure to tent rails any number of ways.
I have a buddy that runs a 1kW in a 4x8 tent on a light mover with amazing results. Hit's 2lbs a cycle off the single 1kW when pumping CO2. He might have reinforced the tent though - can't remember... 2x4s are really cheap...