Photographic lighting setups are very expensive. I have tried to do them on the cheap in the past with less then stunning results. But today there are much better options. Photoshop allows for the correction of what is typically the biggest problems of photos taken indoors and that is color correction. And the ability to do a batch color correction makes it practical. It is even easier if one is working with RAW image files and uses Photoshop's RAW pre-processor.
But still, it is much easier to just start with a well lit image and this article talks about how to get there much cheaper then ever before (unless you just shoot outside).