Seven-Day candles are used by practitioners of many faiths as tools for prayer, devotion, ritual, meditation, protection and healing. They offer a no-mess and safe way to burn candles due to their enclosed nature. They are often used in conjunction with other spiritual products, but many people also use them alone.  Often they are lit once a day, for about an hour, and then they are extinguished.  This is usually repeated for seven days, but this may change depending upon your particular ceremony.