A candle is typically made in about 30 minutes. However, what it takes a long time is the curing process.
Curing is the process in which a candle is solidified from wax to candle. This is a process in which all the ingredients incorporate as candle. Curing can take from 72 hours to 2 weeks. 72 hours is the minimum amount of time before the candle can be lit, this can also determine how strong the scent is.
Some candle maker will ship the candle after 24 hours. The reason for this is that shipping can take up to 3 days, which is the minimum amount of days for a good candle. Of course, candle maker wants the best scent for consumers.