Priest · Discipline · tier 1 · from level 10
Power in Light
+130 Penance healing
5/5 · level 60 · per cast · on targets with your Holy Fire · and 2 more
Power in Light
Rank 5/5
Your Smite and Penance spells deal 10% increased damage to targets afflicted with your Holy Fire.
Averages, counting crits and misses, for a level 60 Priest with a typical weapon and no other gear or buffs, against a target your level. Worked out from the game's own data, the same way as the Foresight addon.