Lumens

 are special refinement items used during the Winter Festival to upgrade a to at most  rank.

Some can be created with certain Simril Lightcrafting tasks. All of them are also contained in and can fall as rewards from a.

These types of lumen exist:


 * (64 RP)
 * (200 RP)
 * (875 RP)
 * (2,000 RP)

The can also be used as a refinement item; if used to refine, it is worth 2,800 RP.