The first thing to consider when buying a desk lamp is what you plan to use it for. For instance, if you are working at your computer, use an adjustable desk lamp so you can focus the light on the keyboard and away from the screen area to prevent glare. Or if you want a desk lamp to illuminate detailed crafts such as needlepoint, a swing arm style lamp is the way to go.

While shopping for the right desk lamp, it’s also important to choose a lamp that is the right size for your workspace. Also, consider the desk lamp’s style and color to make sure that it is a good fit for the style of your desk and the décor of your room.

Before selecting a desk lamp, be sure to check its maximum wattage. In general, a desk lamp should offer at least 150 watts in order to be effective. However, make note of the contrast between the brightness of your workspace and that of the ambient lighting. Aim for a nice balance between the two areas.

Most desk lamps come with a shade but if you need to buy one separately make sure it’s the right size. When measuring, the lampshade should be at least as wide as the broadest point of the lamp body and when viewed straight on, the bottom of the shade should cover the base of the socket. Keep in mind that a too large shade makes for an unsteady lamp.

In addition to a range of sizes, you'll also find shades in a number of colors, fabrics and textures. As for the shape of your shade, options range from cone to square to rectangular; the choice is up to you.

There are also a variety of light switches to select from. Which one you choose depends on the lamp and personal preference. Look out for simple on/off switches that can be rotary, rocker or push, pull chains, three-way switches, dimmer switches, which can take lighting from very low to bright, or an in-line switch right on the cord.

Once you purchase your desk lamp, make sure to place it correctly to minimize shadows on your work surface. If you are right-handed, the desk lamp should be to your left, and vice versa. This ensures that your movements, such as turning pages in a book, won’t cast shadows across your work surface. For best results, your desk lamp should be about 15 inches away from what you’re working on.