AeroGarden AutoFlower Experiment

I recently completed my first soil grow. I forked out shed loads of money on equipment, I had literally every problem under the sun (thrips, mites, nutrient lockout, fungus) but managed to get a decent yield because I planted 13 plants. Even the ones that didn't do well (at all) are a nice smoke. So onto my next adventure. I already had an Aerogarden, and for those that don't know what it is: "AeroGardens are foolproof, dirt-free, indoor gardens - so easy to use that anyone can grow lush beautiful gardens, all year round. With an AeroGarden, you can grow almost anything, anytime, anywhere, with no dirt, no weeds, and no gardening experience needed. AeroGardens make gardening simple. They tell you when it's time to add nutrients, and even turns grow lights on and off to simulate the sun. Aerogardens ensure fast, healthy plant growth by ensuring perfect amounts of light, water and nutrients, with no dirt, no weeds and no mess. Despite what its name implies, the AeroGarden is not an aeroponics system. It's actually more like a top-feed drip system because it trickles the nutrient solution (water and fertiliser) onto the grow sponge to feed and hydrate the plant's roots, the roots of which are growing into the tank of water like a DWC system." Now, the AeroGarden lights are only 60W. I have about 600W extra if I wanted to add extra power, but I have years worth of herb from my last grow, as I'm growing just for myself, for medical purposes. So, even just a few grams would be great, and I'd like to see how much I can get from the AeroGarden without any extra's added. The tank is also only 4 litres, so growing one, or two (max) is possible. I have also added a pretty powerful air pump and air stone to the mix. I'm actually on day 15 now. I've had no problems whatsoever (yet). I change the water once a week, and once a week add new nutrients according to the schedule above. And before anyone mentions it, yes the AeroGarden is an overpriced gimmick. But it's one I already had, so thought I'd give it a go rather than fork out some money for a bigger/better hydroponics system/oxypot/bubbler etc. I'm just intrigued to see what kind of yield I can get from it. I should also add that it is being kept in a room that is almost constantly about 20 - 21 degrees.