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Earth Hour is a worldwide movement organized by the World Wildlife Fund (WWF). The event is held annually, encouraging the individuals, communities, and businesses to give an hour for Earth, and additionally marked by landmarks and businesses switching off non-essential electric lights, for one hour from 8:30 to 9:30 p.m., usually on the last Saturday of March, as a symbol of commitment to the ...
Lights can simply be turned off or light can sometimes be minimized by tarring the windows of large public structures. In World War II, a dark blackout curtain was used to keep the light inside. Tarring the windows can mean a semi-permanent blackout status. During the 1940s and 1950s, cities such as Detroit would practise blackout air raid drills.
A light-on-dark color scheme (dark mode, night mode) is available to Wikipedia's smartphone apps and website (for users using the default skins) since July 2024.. In addition to this there is a gadget on English Wikipedia, and various volunteer-written CSS files that allow customization for logged-in users.
The headlight on this train helps it stand out at night. Trains include a variety of types of lights, for safety, illumination, and communicating train status. [1] The most universal type of light is the headlight, which is included on the front of locomotives, and frequently on the rear as well. [2]
The dark-sky movement is a campaign to reduce light pollution.The advantages of reducing light pollution include an increased number of stars visible at night, reducing the effects of electric lighting on the environment, improving the well-being, [1] health [2] and safety [3] of people and wildlife, [4] and cutting down on energy usage.
A nightlight is a small light fixture, usually electrical, placed for comfort or convenience in dark areas or areas that may become dark at certain times, such as at night or during an emergency. Small long-burning candles serving a similar function are referred to as "tealights".
Cities are exploring more efficient energy use, reducing streetlight power consumption by dimming lights during off-peak hours and switching to LED streetlights which illuminate a smaller area to a lower level of luminance. [87] Many councils are using a part-night lighting scheme to turn off lighting at quieter times of night.
The most notable,that is making me turn it off again now and revert to a Stylus dark mode for Wikipedia , is the halation effect effect. See e.g. See e.g. Why you should never use pure black for text or backgrounds Thanks, asmodai ( talk ) 11:45, 25 April 2021 (UTC) [ reply ]