I am a cheapskate. I photograph paintings. I have put together my own lighting to do this. I (please don't laugh) cut out holes in the bottom of 2 styrofoam ice chests and placed those shiny aluminum bowl type bulb holders in them. Two 3200 k bulbs. I covered the front of the chests with white cloth. And no I can't keep them on long.
I place the light contraptions about 6 feet at an angle on either side, shining on the painting. Am I fooling myself at the quality this might give me? I've been shooting them this way for a while.