It is a well known form of meditation. If there is a particular quality that you would like to enhance in yourself such as your intuition, then you could choose a green coloured candle to open your insightfulness. Many candles are made with toxic substances such as paraffin, which release harmful vapours when burning. Look for candles made from beeswax, or soy wax. They are non-toxic, and burn longer. Check out some of the benefits of candle light meditation-
Candle light meditation helps to improve your mental stability, in turn giving you your must needed mental peace.
As your eyes are fixed on the candle flame, they don’t see anything beyond the flame. In such a situation, your brain receives no new information to process. It is the nerves of your eyes that send signals to your brain. But in this case, no signal is sent. As a result, images beside the candle begin to fade away from your vision. During the experience, while your eyes are open, you only see the flame and nothing else.