Tips for indoor herb garden?

Hey all,

I'm getting ready to move my gardening indoors. Mainly, I'd like to successfully grow kitchen herbs inside for the winter.

A bit about my house: my sunniest window is in the kitchen, and while it's pretty sunny, plants grow really leggy there even in the spring and summer. I figure I'll need some kind of grow light, but I'm wondering what's the minimum that'll actually work?

Anybody have experience with this and/or references for light shopping?