Desk lamps come in many sizes, shapes, and colors.They use a multitude of different types of light sources including fluorescent for a wide even light, halogen for extra bright concentrated light, or incandescent for a somewhat concentrated and somewhat even light. Points to consider in choosing a desk lamp are; where is the base going to sit or
the clamp to clamp-on, is the arm long enough and flexible enough to get you the light where you need it and out of your way when you don't need it, and what kind of light you are going to need for your task at hand. Desk lamps are usually considered a secondary light source for a home office, a primary source such as a cloud fluorescent fixture, or better still halogen track lighting, should definitely be used to prevent eye strain and headaches.