Flick off. Go on - flick off. If you don't want to be left out in the dark - well actually if you do - then don't forget to flick off the light switch for Earth Hour this March 28.
Initiated with a bang in Sydney in 2007 when more than 2.2 million homes and businesses flicked the switch ensuring a hefty amount of carbon emissions didn't enter the earth’s atmosphere, Earth Hour now wants more than a billion people in 1000 cities worldwide, to turn off their lights at 8.30pm on March 28.
The WWF is asking people to Vote Earth while the Earth Hour organisers want to make it the largest climate-driven event in history and draw the attention of world leaders to the actions which need to be taken to combat climate change.
And for many companies it's a great chance to set a vibrant green example and potentially persuade persuade IT peers to investigate ways they can save on their operational costs by taking a closer look at what impact they have on the environment.
One company taking a lead this year is Sharp Australia, which will turn off its advertising billboard in North Sydney in support of Earth Hour.
While many IT companies already spruik environmental responsibility initiatives around recycling computer goods and implementing virtualisation type technologies, they can add to their green credentials by switching off unused lights, migrating to energy efficient light globes, flicking off appliances on standby, using less hot water, travelling by public transport, and switching to green power to name but a few options.
So to be part of a movement that has spread from the humble shores of Sydney Harbour to over 1000 cities worldwide flick off your lights.