I use a light box that I bought but sometimes a white sheet is fine. It's more important to find the correct settings on your camera for the light you have. I set up a bunch of lights, all from home depot with the silver bowl-base, cheap btw. Then I played w my cameras manual settings until the pics looked right. White balance is ESSENTIAL. They say to never use the flash and that has proven true. Put you camera on manual, get out your manual and read it, or go online to find out how to do it, but play w the cameras settings 'till you get it. (you won't break it) I always use the same consistent lighting, which is great at 2am or on a rainy day or even a too sunny day and only really need to adjust for my backgrounds which are white or matte black. And I too use Picasa to crop and play w light.