With a desk lamp, you can continue working in the evening, without turning on a lot of light at once. You can also just shine a small light. It's often possible to decide the temperature of the light. Choose a bright clear light if you need to focus on work. A soft warm light help you relax. Nowadays, desk lamps can do more than just provide light. There are lamps that can wirelessly charge your phone. That's efficient, and you don't need an extra cable on your desk.