Basic electronics question: is it bad to have a transformer that’s too big?
My daughter has a bunch of lighting fixtures that each have two 50 watt, 12v PAR bulbs. Inside, there is a 100w toroidal transformer. They have been swapping in 7 watt 12v LED bulbs.
I want to know if they are actually saving electricity using those low wattage bulbs with a high capacity transformer. My gut tells me Togo find a 15 watt replacement.
now a related question. They replaced the high wattage bulbs with LEDs and ran it. Now, for some reason, the transformer is bad. There isn’t much to these things. They are a doughnut shaped core wrapped with copper. Did running the LEDs lead to the failure?