With this daemon it is possible to remove particles when a time limit is reached. Another possibility is the creation of additional particles based on a particle’s lifetime, e.g. for the creation of foam and spray.
Life
This parameter sets the life-span for all particles given in seconds.
Variation
You can alter the life span to create a more random behaviour when particles are disappearing. “Variation” is quoted in seconds and accepts both negative and positive values. Be careful with very high settings, because they can create an unwanted flickering.