I would add at least three more 23-26 watt cfl's. You have 36 watts of cfl running right now thats about 2300 lumens, thats around 650 lumens sq ft.
Three more 23-26 watt cfls would bring you up to around 2200 lumens sq ft.
Try and get cfl's around 6500k (kelvin) spectrum for vegging plants. Also make sure you have decent ventilation because cfl's do produce heat. Try and keep your cfl's 3-6 inches off the tops of your plants.