well depends on the watts of the cfls and the t5's, it is said that 5,000 lumens per square feet is enough.

While jorge cervantes says that 10,000 lumens per square feet is what you want.

I have one plant under 12 26w 2700k CFL bulbs and i still think its not enough.

Note: that this plant is inside of an 18gallon bin

edit: oops just saw that your setup was 2' by 4' i would definitely look into getting more bulbs for flowering as you will not be happy with the results unless you increase the lumens
superskunk1 Reviewed by superskunk1 on . First time grow in progess watch them grow So i've never grown weed before and i thought i'd try it and give it a shot. i was completely new to the whole growing thing but smoked lots and lots but never got the chance to watch the babies grow. I have a closet setup about 2' wide by 4' long where right now im vegging 5 plants under a T5 4 bulb 2 foot light 6500k 89 w Im using fox farms ocean forest mix with humboldt nutrient grow and humboldt nutrient bloom. (might need one more mix for micro nutrients?) I have the light hung Rating: 5