Somehow the idea of placing electrodes into a water-filled orb to seems like a bad idea. However, artist Scott J. Franklin has designed a series of glass lighting fixtures that do just that.
The WET Lamp from NON Design is a glass orb with a 10-watt xenon light bulb in the center, then filled with water. You gently place a thin silver rod into the H2O, and the bulb illuminates. As an added bonus, bulb is dimmed depending on how far the rod is inserted into the water.
The lamp is available from Highlights Lighting in small, medium and large sizes ranging in price from $210 to $340 USD.