Okay, automated lights off function was fantastic for the three days it worked. Slept better, not only because it was dark but also the room temperature did not rise that much cause I wasn't burning the lights all night.
I have few 12 V halogens for the bedroom, connected to a conventional transformer. I suppose this is the reason why the ACT plug in lamp-module just died last night. It was used only for these few days
Has anyone tried to fix those modules? It must be the output stage that died..