My wife set up a British Gas monitor thingy to sit next to the one from our new solar panel which shows how much is being generated. I've noticed when I switch on 9 downlighters in the kitchen the power consumption drops by about 120w and jumps back up when they go off! I've checked this lots of times and am sure it's not a coincidence. Also I dont think it can be reading "back to front" (if that's possible) as it jumps up normally if I switch on the kettle etc.
I've noticed the halogen bulbs dont last long (replaced at least twice a year) Could there be some weird thing wrong with the transformer accounting for this apparent anomaly?
Thanks in advance for any thoughts. NB I have no expertise in electricity whatsoever