If there are some shelves, you may hang the lights on them – to accent the display or to enlighten the desk more precisely. It’s a great idea and is very easy to realize – no time for attaching the lights anywhere is needed.
Hang the string lights to separate the working space from other spaces visually. Hang them on a mirror or door next to your space to add more light but not right to the working space, just around it. Put the lights right on the desk to feel like in a magical garden. Enjoy!