When shooting using a light tent
a low intensity light source is quite useful. The CCFL (cold cathode fluorescent light) found in LCD screens is perfect for this purpose. CCFL and the associated light scattering panels can be found in broken laptop and lcd screens for virtually nothing.
This Instructable shows how to use the a salvaged panel, a DC power source and inverter to create a large, low intensity light.Some Words Of Warning
This project involves electricity, high voltage and soldering. If you do not feel confident about working with any of these things, do not attempt this project.