Working with candles is a simple or complex minor magick, depending upon the rite or ritual you perform along with it.

Candle magicks can be used alone, in sacred space, or combined with folk magicks for practically any type of human situation.

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 thier 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 their ancestors.

In all fairness to the magickal community, knowing a few working witches who do not use candles at all and scoff at the interesting 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.