There's no definitive answer to this question since it depends on a variety of factors, such as the size and height of your sofa, the type of lamp you're using, and the overall style of your room. However, we can give you some general guidelines to help you choose the right lamp height for your space.
If you have a small sofa, then a tall lamp may be too overwhelming and make the space feel cramped. In this case, opt for a shorter lamp that will still provide adequate light without being overpowering. On the other hand, if your sofa is on the larger side, then a taller lamp will likely look more proportional and add balance to the room. Just be sure not to place the lamp so high that it's out of reach when you're sitting on the sofa!
When it comes to choosing the perfect lamp height, it's really all about trial and error. Take some time to experiment with different heights until you find what looks best in your space.