Joan,
Lighting is always an issue. There is a thread on the forum that goes into detail about lighting. However, I suggest that you visit this site to order light bulbs (
http://www.lumiram.com/fluorescent.html). The bulbs you probably want to order are either the lumichrome 6500K (temperature in Kelvin) with a 98CRI (color rendering index) or the 5500K with a 95CRI. These bulbs simulate natural north light very closely. I have the lumichrome 6500K 98CRI in my studio.