When the lights are working, will the TV and radio reception be effected? Does the transformer hum?
Häfele transformers feature Radio Frequency Interference (RFI) protection. Only in the case of the transformer being plugged directly into the same circuit as the TV or radio is there even a possibility of any interference from the transformer. If this does happen, it will only be on the low band stations (TV 2, 3 or 88FM etc.). RFI protection is the most advanced in the industry, but there is no way to eliminate the low band bleed-over except to plug the transformer into another circuit. As for humming, the transformer emits no audible noise and has a sound rating of A+.