Light

Were you looking for The Traveler's Light? Light is a Guardian attribute that boosts the Guardian's level past 20, increasing the damage done by subclass abilities against higher-level enemies. A Guardian's Light can be increased by equipping armor that boosts it.

Level Requirements
Rare armor can only give a maximum of 21 Light per piece, giving a total of 84 Light and allowing the Guardian to reach level 26.

Legendary armor obtained inside the Vault of Glass can give a maximum of 30 Light. If a Guardian has four pieces of these Legendary Armor or three pieces and one Exotic piece of armor, they can reach a total of 120 Light, hitting level 30.

Vanguard, Crucible, and Faction armor gives a maximum of 33 Light, allowing a Guardian to reach level 31.

Exotic armor, Iron Banner armor, and Crota's End armor has a maximum of 36 light, allowing a Guardian to reach level 32.

The following table lists the amount of Light required to reach levels beyond 20.