Hi,
You haven't imported/setup your fbx properly, all these warnings are Unity warnings. It's all to be fixed prior working within PlayMaker.
Also, this Light animation, if it's just a fading, I would strongly encourage you program it using playmaker and not using a baked animation coming from the FBX, that sounds to me too much for too little.
is it just a question of animating the brightness of the light aftter all?
bye,
Jean