I have 2 x really cheap and nasty domestic LEDs, 100W each but probably no more usefull wattage than the
ts1000 between them, no tent or reflective material of any sort, 12 inch pots, cheap supermarket compost, no proper nutrients, just a northern lights auto in a cupboard with two lights over it, getting watered on Sundays. Fourth grow and each has improved slightly, the last one was exactly two ounces, so given that your grow will improve on mine on all fronts I'd say that's a reasonable minimum.