morning, we have a rental property let to a family and the house inside is festooned with fairty lights, literally 100s of them all round the picture rails, up and down door frames, covering the ceiling in the big hallway and around at least 3 trees. Maybe around 7 or 8 sets of lights. They are bing left on when house unattended. Looking for an opinion as to whether therse much danger with all this?