It's really difficult to impossible not fall for it: see these LED candles from a distance look like real candles. Only a closer look at the candles revealed the hoax. The batteries last loose by up to 9 hours. The candles make just a perfect lighting mood in dark rooms. Ideal for the windowsill, niches or for the nursery. The LED's flickering light, which is intended to simulate a candle. This works perfectly. I imagine in the absence now in the dark at night time getting a copy on the windowsill. From the outside the house looks occupied: None'd come up with the idea to have a candle burning in his absence.
