If it's an electronic transformer you can get some strange output voltage readings if there's no load or insufficient load connected. If it's a wire wound transformer then the output voltage will be stable regardless of the load being connected or not.
my understanding is that it is electronic. I am just waiting for the misses to get home to make sure she likes the style before i go back to Ikea to replace it. Although its six months old now but have only just got round to putting it up.
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