How to use T2DParticleEffectData

Hey guys, this will seem a bit simple to some of you, but I need some advice:

T2DParticleEffect Temp = BallVFX as T2DParticleEffect;
Temp.StopEffect (true);

// T2DParticleEffectData describes the operation of a T2DParticleEffect.
T2DParticleEffectData lifespan = new T2DParticleEffectData();
lifespan.Lifetime = 10f;

My problem is that I want to set the lifetime of Temp. You know how to do that?

Thanks