I just installed some LED strips in my kitchen. There are lots of inexpensive options available. Unless your room is enormous, or you're looking for something really elaborate, you can get 5m strips for around $15-$20 each. Add in a power supply and dimmer switch for another $40-$50.

This is the place I used, but there are many others.
LED Wholesalers

I started out with nothing & I've still got most of it left
M60 VP160 QS8 EP350
M22 VP100
Algonquins