This is the consecration ritual I use on all candles that will be used in ritual or as offerings. It is derived from the Key of Solomon, Chapter XII: OF THE LIGHT, AND OF THE FIRE which specifies the preparation and blessing of the candle for use in the lantern.
The blessing should be done in the day and hour of Mercury when the Moon is waxing.
Recite the following psalms over the candles:
Then recite the following over the candles:
O Lord God, who governest all things by thine almighty power, give unto me, a poor sinner, understanding and knowledge to do only that which is agreeable unto thee; grant unto me to fear, adore, love, praise, and give thanks unto thee with true and sincere faith and perfect charity. Grant, O Lord, before I die, and descend into the realms beneath, and before the fiery flame shall devour me, that thy grace may not leave me, O Lord of my soul. Amen.
I exorcise thee, O creature of wax, by him who alone hath created all things by his Word, and by the virtue of him who is pure truth, that thou cast out from thee every phantasm, perversion, and deceit of the enemy, and may the virtue and power of God enter into thee, so that thou mayest give us light, and chase far from us all fear or terror.
Then sprinkle them with the blessed water and fumigate them with incense.