This was recently mentioned in the TWAB but the mod Font of Light doesn't do what it's stated to do. It's actually much much better. The mod says that while Charged with Light doing a finisher will spawn an Orb of Light for allies. What it actually does is while Charged with Light if the player takes damage while in the Surrounded state (3 or more enemies within 15m) the player releases a burst of Arc energy similar to Feedback Fence to all enemies within that range. Unlike the exotic however the damage is extremely high. Higher than the initial hit of a Lightning Grenade. It also seems to deal a sort of inverse splash damage. The further enemies are from you, the more damage they take. It's really cool, and an absolute must have perk for any close ranged build.⚡ The secondary perk works exactly as advertised.