A 21 Photo Rotating Lamp likely means that it can display 21 different photos or designs, rotating through them either manually or automatically. The sublimation aspect suggests that these photos are printed onto the lamp using heat transfer, resulting in vibrant and durable images.

• Personalized LED Rotating Lamp with your choice of photos
  * Required 21 Photos of your choice to print. 5 Big Size and 16 Small Size
  * Avoid Group pics to get better quality. Single or Couple pics are recommended to print on this lamp
  * Made of MDF wood material and a Trans-lite sheets pasted to the product
  * Photos will be printed and glued to the pre-fixed trans lite sheets and so it will illuminate when the lamp is turned on.