Halogen lights are not usable for growing anything. All it will do is strech the plant and burn it to death.

Get some CFL's (Compact flouresant lgihts)

They're cheap and they will get you started.

If money isnt an issue id veg with these, and get a 250 - 400 watt HPS (High presure sodium) light to flower with, belive me, you'll see the differnce.