You're using a flood lamp.. Halogen lights are horrible for growing with, they are in the wrong color spectrum and they get way too hot.

Your leaves are curling up because they are stresed out due to heat. Remove your halogen lamp and go buy 8 23 watt CFL's and set them up on a Y splitter on a power strip. You will probably achieve better results from being in a better color spectrum as well as much lower heat.

Stop feeding with nutes your plants are only 2 weeks old. :thumbsup: