Conkers or Chestnuts??

.... what is the correct term..??

However - nearly went bonkers today. Waited for the electrician from 8am on (the lights in our entrance hall(?)/ floor (?) .... the part of the appartment that is not a room??? - doesn't work at all. Called him on Thursday. He called back on Monday. Said he would be here today at 8 am. Phoned at 10 am. And again at 11 am. He called back at noon. And finally was here at 2pm. And has to order some stuff. Will be back. On Monday. Maybe......
Best I go and buy some hand lanterns and torches - the days are getting shorter...!!!!