You need more light, you have in the order of 12,000 lumens in there, which is enough to light one square foot slightly more than the sun does. Plants need 3000 lumens/sq ft minimum to grow, optimum is around 7-10,000/sq ft. The sun gives 10,000 lumens per sq ft (approx) on a clear day.
The colour temperature of your cfls is more suited to flowering, you want 6500k, daylight bulbs for veg. You may as well get higher wattage while you're at it, you want as much light in there as possible.
The fluoro tubes, on the other hand, are leaning towards the ultra violet spectrum, I'm not sure they'll make much difference, esp. with those covers diffusing the light.
You'll also want some ventilation, plants need to breath, they like a steady stream of fresh air flowing over them as much of the time as is possible, otherwise they'll soon deplete the co2 in your cupboard. Opening the door is not enough, you'll want an extractor fan to remove the stale air, which will bring in fresh air at the same time. Just make sure the intake and exhaust are in different locations and it'll be fine.
And sort out those emergency blankets. If you're gonna use them, get them as flat is is physically possible or the light won't reflect back at the plants, it'll just bounce about around the walls.
