Astronauts in the International Space Station may notice the earth seems a little dimmer on March 28. Some will hope they see a complete blackout.
That Saturday evening marks the annual WWF Earth Hour. Millions of people will turn off their lights at 20:30 local time, to draw attention to climate change, food waste and many more environmental issues.
The Empire State Building, the Eiffel Tower and the Sydney Opera House are among more then 18,000 iconic buildings across 180-plus countries that will part in Earth Hour
Organisers hope these global gestures will increase pressure for action at three key United Nations (UN) policy-making meetings later in the year; sustainable development in July, climate change in November and biological diversity in October, always presuming these will go ahead.
Find out more about #ForPeopleForPlanet and a decade of action.
Earth Hour has taken the climate emergency conversation from conferences to mainstream thinking, as well as:
With Earth Hour in mind, Energy Saving Trust is encouraging people to put their daily home and business lighting use under the spotlight.
The typical UK household has around 33 light bulbs, accounting for around 15% of your electricity bill. By using effective lighting controls (switching off unused lights) and energy efficient lighting (LEDs), lighting could drop to around 4-6% of the UK’s total electricity use.
The quickest way to start saving is just remembering to turn lights off when you don’t need them. The typical household could save almost £15 a year just by switching off the lights as you leave the room, with greater savings still if you use energy efficient bulbs.
Switching from traditional halogen bulbs to a similarly bright LED can save you up to £3 per year per bulb, equivalent to around 5kg of CO2 emissions.
By replacing all bulbs in your home with LED alternatives, you could save about £39 a year on your electricity bills, around 63kg of CO2 emissions.
If all 28 million homes in Britain switched to 100% LED bulbs, we could save 1.7 million tonnes of CO2 emissions annually.
Compact Fluorescent Lamps (CFLs) were the first energy efficient bulbs on the market and are around 80% more efficient at producing light than traditional incandescent bulbs.
But now they have been largely surpassed by LEDs, which are more efficient still, turn on instantly at full brightness, and are available to fit pretty much any light fitting in the home. They also last even longer than CFLs, and now the cost of the bulbs has come down they will definitely save you more money in the long run.
A good LED bulb should last between 15-25 years (15,000-25,000 hours) based on average use of being switched on for about 2.7 hours per day.
Different bulbs emit a different colour of light - it can vary from a warm yellow colour to the bluish-white colour of bright daylight. Colour temperature is measured in Kelvin (K) and you just need to select the right bulb.