Affordable task lights (for your desk or workspace) are pretty tough to find. I've noticed that West Elm has recently come out with a few that are attractive and priced affordably.
1. Collector Task Lamp $79.99
Note: this lamp only works if you can clip it onto you desk as shown in the image.
2. Industrial Task Table Lamp $59.00
3. Pratt LED Table Lamp $129
This lamp was designed in collaboration with students from The Pratt Institude, a design school in Brooklyn, NY. LED is an excellent option for lighting because it uses significantly less energy than incandescent bulbs. The LED bulbs also last practically forever.