Pink lights have been installed on a housing estate in England in a bid to deter gathering teenagers by highlighting their spots.
Layton Burroughs Residents' Association in Mansfield made the move in the hope of cutting anti-social behaviour.
David Brown, an independent councillor for the area, said the lights, which show up skin blemishes, had been put up in a subway where youths regularly met.
"I totally agree with it and it seems a good idea," he said. "I know that high-pitched sounds have been tried before but didn't work.
"It's the first time I've heard of it and it will be interesting to see how effective this is.
"It's effectively embarrassing them into moving on but they could just see it as a big joke and turn up with balaclavas."