In Rayman Legends, Lums function as a vital in-game currency with several significant benefits for players, enhancing the overall gaming experience in multiple ways:

1. Unlocking Costumes and Creatures
Lums are primarily used to unlock new costumes for characters in the Character Gallery. Players can also obtain creatures through the collection of Lucky Tickets, which are redeemed for these collectibles. The creatures are particularly beneficial as they can generate Lums passively for players each day, thus creating an ongoing source of this valuable resource.

2. Achieving Score and Completion Rewards
The accumulation of Lums directly impacts players’ scores. Successfully collecting a large number of Lums can lead to earning gold and diamond rankings within various levels. For instance, achieving a diamond rank during extreme challenges can reward players with up to 20,000 Lums. These high scores not only enhance overall completion percentages but also support players in progressing through the game by unlocking new content and rewards associated with improved rankings.

3. Progression Utility
While the primary goal in each level is often to rescue Teensies, collecting Lums adds a layer of challenge and variety to gameplay. Players gather Lums by defeating enemies and exploring various parts of the levels, encouraging thorough exploration and engagement with the game world. This not only enhances gameplay diversity but also allows players to unlock additional content and improve character capabilities, albeit indirectly.

4. Farming and Accumulation Strategies
Many players adopt specific strategies or farming techniques to accumulate Lums more effectively, facilitating faster unlocking of costumes and creatures. By targeting levels that yield a high number of Lums or repeating certain areas, players can expedite their progress and ensure they have access to all available customization options in the game.

Conclusion
In summary, Lums play a crucial role as an in-game currency that unlocks cosmetic items, new characters, and passive creatures, as well as providing rewards for high performance in level completion. While they do not directly impact character abilities or provide immediate advantages during gameplay, their collection is essential for enriching the player’s experience and unlocking the full potential of Rayman Legends. Thus, collecting Lums strategically can lead to significant benefits, making them a key focus for players aiming for completion and customization.