probably...i have a 400 watt t does great but doesn't reach the lower branches very well so keeping them short does help.height is no problem, my worry is light not getting down the into the plant with only 400 watts, so I should keep the plant short but how short, this type doubles in flower right, do you get most from the top of the plant, say I did 2 feet veg goes to 4 feet flower would that be to tall for the 400 watt to do its job,