The best clip-on lamps not only look sleek and stylish, but they should be able to work with the specific needs of your space. For example, if you're working at a desk around the clock, then a lamp with adjustable brightness and color temperature can help ensure that you can see clearly without strain as the day goes on. Some of these lights are wireless and rechargeable, making them travel-friendly. Other plug-in types are meant for permanent placement, but their flexible necks can swivel in any direction to cast light nearby.