A little article i found while surfing.
As a candle burns it releases not only it's wax but it's color into the atmosphere. Whatever has been connected with the candle as in the form of embedded energy or written on the candle will transmigrate to a plane where it can do what you have intended and focused on it to do. A candle, like everything else used for a magickal purpose, has to be consecrated. Use the general consecration for candles. They are creatures of Fire or of Art. Make sure to check the Moon phase before working any spell. The phase of the Moon will greatly affect the outcome of your spell. After consecration a candle must be dressed. This consists of anointing the candle with a special oil you have chosen for the purpose in mind. There are many other things you can do to embed a candle to your purpose. You can etch runes in it; a name on it; a purpose for it to perform.. Really the list is endless.
Candle magick works on the following principles:
The color of the Candle
The type of oil you use to dress it
The sigils you carve (or do not carve) upon it
The sort of divinity you call as you light it.
You can make candle magick complicated, if you like. This involves the array of colors, deities, oils and the use of timing. There are five day candle spells, seven day candle spells, ninety day candle spell. Tarot candle spells, astrological candle spells, and planetary candle spells.
Timed spells required specific number of candles to be burned on a specific day or number of days and at the same time each day for a set period of time. A whole ritual can be written around a candle spell.
In short, there is no end to your ingenuity in working with candle magick it is fun, inexpensive. Candle spells usually involve chanting, a poem or charm as well as raising energy. Most Wiccan students are taught candle magick early in their training in order to give them confidence when they continue to the more difficult aspects of the various magickal operations.
Candle magick is versatile and is used by adepts to center and focus. Black, Red, and White are the primary candle colors, and you will find that Witches who have been working for many years will stick with these colors and don't worry about the others. Part of this is due to practicality and their excellent visualization skills, while still using the magickal colors of teir ancestors.
In all fairness to the magickal community, knowing a few working witches who do not use candles at all and scoff at the intersting things you can do with them.
What you believe is entirely your business. Remember that the Wiccan way is not to rain on someone else's magickal parade. If someone is tied to candles and their magick and you are not, so be it.
Hope it can help someone