hi.i have security light with pir sitting on out side wall very close to boiler flue.problem is smoke keeps triggering it on all the time.i have decided to replace it with separate pir further away from flue and leave light where it is at the presant.first of all i would like to know how to connect new pir to old light.could i use same light if existing pir is terminated or its worth buying new bulk head possibely new energy saving one.i need better quality pir,so any brand suggestion.thanks