I'm using a AA-battery powered LED gooseneck lamp that I bought at Harbor Freight Tools for about $25. It was marketed as a small workbench lamp for close work, but you can find the same thing at Lowes marketed as a BBQ grill lamp. What's nice besides being inexpensive, bright, and easy to aim, it has a hefty C-clamp base that will fit up to about 2-inch thick surface. Warning: this lamp will show up every speck of dust on your LP record that you though was clean!
