Princeton lost the Earth Hour challenge to Keremeos last year, but has another chance to prove itself this March.
On March 31 at 8:30 p.m. hundreds of millions of people around the world will show their support by turning off their lights for an hour.
FortisBC customers dropped their electricity consumption by one per cent last year - the equivalent of turning of 50 thousand light bulbs.
The winner is determined by the number of pledges received per community based on its population.
Princeton came in 11th out of 18 communities last year, while Keremeos earned top place.
The Keremeos Legion won a $5,000 energy upgrade. A similar prize is up for grabs this year.
Earth Hour started in 2007 in Australia with 2.2 million homes and businesses turning their lights off for one hour.
Millions of people from more than 135 countries are expected to participate this year.