I am helping my mom, she had her gas lamp post converted to low voltage some years ago. I re-built the harp no problem. here is where I need the help, the light runs off the door bell transformer. That is either 16v or 24v? I forgot to look, but I need to put a photoeye in line to shut the thing off. I can find plenty 12v photo eyes for your common landscape lighting. If the transformer is 16v can I use a 24v photoeye and will it work properly? Sorry for sounding so stupid, but I want to fix it right.