Best Results Indoors:
Use the tungsten film already mentioned, with 32K photoflood bulbs, that are designed to work with the film. The film comes in two "grades." One has to be refrigerated and the other does not seem to need it. But I keep all mine in the fridge until I use it. Be sure to check the expiration date. I have used film after expiration, though, and it seemed to work fine, but I am not recommending this, because I have heard that it can lead to poor results.The bulbs come in 250watt, or 500watt. The 250watt will probably be adequate for your needs. You will have to use somewhat long exposures with them. The bulbs have standard fittings, and will work with rather inexpensive light stands, available from Dick Blick. I have made my own stands from clip on lights from Home Depot. The stands I made from 2 x 2s screwed together. The base can be more 2 x 2's or a round piece of plywood, etc. Whatever it takes...homemade stands can be built for under $10. They are not really recommended for this type of lighting, and the tungsten lights get quite hot, so NEVER leave them on for too long. I can only recommend you use this method if you turn them off after you shoot each artwork. It is a good idea anyway, because the tungsten bulbs have a short lifespan of about 5 or 6 hours before they begin to lose their proper light spectrum. So turn them on after you have the art set up, and then off again once the art is shot.
The lights need to raised to the same height as your camera. Your camera, on the tripod, needs to be set to where the middle of its lens is at the same height as the middle of the painting on the wall. This is very important. Having the camera parallel, not pointing up or down, level and completely square to the artwork, not angling to the left or right towards the artwork at all, is very important. I hope this is clear.
