Sustainability
![](http://wwfhourbank.awsassets.panda.org/img/switch-the-lights-off---opt-for-natural-light-_1203.png)
During the day, there is little need to have your non-essential lights glaring. Use an hour to clean your windows and skylights and watch the natural light pour in. Boost your happiness and enjoy the extra Vitamin D!
![](http://wwfhourbank.awsassets.panda.org/img/switch-the-lights-off---opt-for-natural-light-_1203.png)
During the day, there is little need to have your non-essential lights glaring. Use an hour to clean your windows and skylights and watch the natural light pour in. Boost your happiness and enjoy the extra Vitamin D!
Recevez des mises à jour, des conseils, des ressources et plus encore, et découvrez nos autres initiatives passionnantes au WWF !
Earth hour has partnered with Epson in 2024 to encourage more people to take actions to save energy and make energy-efficient choices.
Find out more about Epson at https://corporate.epson/en/