B.C.’s electricity provider says participation in the annual dim your lights Earth Hour campaign is waning in the province, but the World Wildlife Fund — the non-profit organization that created the event — says BC Hydro’s measure of who takes part is flawed.

Earth Hour, an event in which people around the world volunteer to turn off their lights and non-essential power, began in Sydney, Australia in 2007.

Philippe Devos, head of communications for World Wildlife Fund Canada, said it’s a symbolic event aimed at spurring people to think about conservation