This information is meant only as a guide. Burn rates will vary from candle to candle and are greatly affected by atmospheric conditions in the church. All data assumes the use of a candle follower when burning, and is express as an average rate the candle uses the wax.
To determine the proper altar candle length, remember to allow for the length of the stub plus thee depth of the follower. For example, to determine sufficient length of a 2" diameter candle to be burned continuously for a 72-hour devotion, divide 72 by 6.62 for 51% beeswax or 3.71 for Stearine. Add to that number the depth of the socket plus the depth of the follower to determine the minimum size to provide the burn time. in our example, assume the socket is 2" deep and the follower is 2-1/4" high. In this case, you would need a 51% beeswax candle at least 16" in length (2" x 17" is a standard size) or a Stearine candle at least 24" in length (2" x 24" is a standard size) to provide the desired results.