Speaking of "power matters." Is Power Level cannon? (Destiny)

by Ragashingo , Official DBO Cryptarch, Saturday, May 05, 2018, 23:21 (2735 days ago) @ cheapLEY

While there are occasional references to Guardians growing more powerful or the unusual or awesome power of individual Guardians, I don’t think there’s ever been anything like an in-game or in-lore reference to Light Level or Power Level. The closest thing I can thing of is when the Exo Stranger tells us that “Many Guardians fell. Strong ones.”