In Buyer's Guides: Table Lamp Buyer's Guide: How to pick 'em
If given the chance, pay attention to the lighting next time you're watching a favorite show or movie. You'll notice something important. Hollywood, masters of the sub-conscience, pays a lot of attention to lamps and how they are used in a shot. Why? Because, they may not be picked up as the center of attention, they set the mood and over all opinion of the brain through an ambiance. Plus, a good table lamp isn't obvious, where as an out of place table lamp is hard to avoid.
In other words, table lamps are easy to overlook, but they are immensely important.