Burning a candle for more than 4 hours

It is generally recommended that candles should not be burned for more than 4 hours at a time. There are a few reasons why:

1. Safety: Burning a candle for an extended period of time can increase the risk of fire, as the wick may start to get too long or the candle may overheat.

2. Soot buildup: Burning a candle for too long can cause soot to build up on the wick and in the wax. This can lead to a smoky flame and can discolor the wax.

3. Uneven burn: If a candle is burned for too long, it can create a tunnel in the wax, where the center of the candle melts down faster than the outer edges. This can lead to wasted wax and an uneven burn.

4. Shorter lifespan: Burning a candle for too long can also shorten its overall lifespan, as the wick may start to become too long and the fragrance may dissipate more quickly.

To prevent these issues, it is recommended to burn candles for no longer than 4 hours at a time. After 4 hours, extinguish the candle and let it cool for at least 2 hours before relighting. This will help to prevent soot buildup, ensure an even burn, and prolong the life of the candle. It's also important to trim the wick to 1/4 inch before each use to prevent the wick from becoming too long and to ensure a clean burn.