With new research revealing the explosion in popularity of staging spectacular outdoor Christmas lights displays – and the cost of doing so – price comparison website money expert is searching for the UK’s answer to Clark Griswold, the iconic Christmas lights enthusiast from the classic movie, National Lampoon’s Christmas Vacation. The competition is being run by price comparison website money expert, in response to new research that reveals that householders’ outdoor light shows are now an essential festive must-do and must-see.  A…