Grow space

I have 3 plants 16 inches high in a 2x4x5.5 tent planted in 10 gallon cloth bags in their first week of flower they are under 1100w and a 450w leds will I run out of room in my tent b4 they finish

Should be fine, you can LST, supercrop or SCROG them to maintain an even canopy at your desired height.