nope no way you can have all the tubes you want you still only have 5000 lumens now you just have a better spread of your light where a single 400watt hps bulb produces 52,000 lumens and just like the hps two 400watt bulbs does not equal 104,000 lumens

i heard good things about the T5 series they are great for scrog.... i dont mean to rain on your parade you can still get outstanding plants using those lights im jut explaining the lumen part of it