Hey henkas, nice start. You need to move the lights you have within an inch or two of the tops of your plants. You don't need more light, you just need it closer to the plants. OR the plants will start stretching, which is fine, then you will have a reason to learn about propping up stretched plants. Light loses intensity very quickly, your using floro's and cfl's which are also floro's, not that much heat as long as you have good air circulation.
You may have an oscillating fan there and I am just not seeing it, you do need one in a small space like this one is.