You can add more hot lights to get more light. For example, instead of using one hot light in an umbrella, you can use 2, 3 or even 4 to get more light. If you were to buy more powerful hot lights. I would recommend that you go with Photoflex.

I would not recommend you go with strobes until you are comfortable enough to previsualize your light set up and know what type of lighting you are going to have before you even turn on the lights. After you get to that point, then I would recommend going to strobes, probably Alien Bees.

You should go to Web Photo School . You can learn a lot about lighting there. To learn about strobes, I would send you to Alien Bees . Another place to go would be Studio Lightning.net . This should keep you busy. Happy reading.