Code:
oUF.Tags["[beacon]"] = function(u) return UnitAura(u, "Beacon of Light") and "|cffFF5500.|r" or "" end
oUF.Tags["[shield]"] = function(u) return UnitAura(u, "Sacred Shield") and "|cffFFCF7F.|r" or "" end
oUF.TagEvents["[beacon]"] = "UNIT_AURA"
oUF.TagEvents["[shield]"] = "UNIT_AURA"
is the tags..