Something's Rotten in Faerun
Candle of Invocation
These specially blessed tapers are dedicated to the pantheon of gods of one of the nine alignments. The typical candle is not remarkable, but if a detection spell is cast, it will radiate magic. It also radiates good or evil, if appropriate.
Simply burning the candle generates a favorable aura for the individual so doing—if the candle’s alignment matches that of the character’s. If burned by a priest of the same alignment, the candle temporarily increases the priest’s level of experience by 2, enabling him to cast additional spells. He can even cast spells normally unavailable to him, as if he were of the higher level, but only so long as the candle continues to burn. Any burning allows the casting of a gate spell, the respondent being of the alignment of the candle, but the taper is immediately consumed in the process.
Otherwise, each candle burns for four hours. It is possible to extinguish the candle as placed in a lantern or otherwise sheltered to protect it from drafts and other things which could put it out. This doesn’t affect its magical properties.