The clicking could be the starter in the bulb, depending on how these builbs are designed and built, some bulbs, require a starter, and the starter will make a clicking noise, this could be what is happening, sense your filiment, is burned out, or used up, what ever the case, the starter is cycling, trying to start a bulb that is “dead”..


Again, I don’t know how these bulbs are made or exactly what kind they are, this is only one possiblity. Might be right, might be wrong… don’t know.