Helena Joyce
Light pollution is the human-made alteration of outdoor light levels from those occurring naturally. It has harmful effects on the environment, wildlife habitats, and human quality of life. Light pollution interferes with the natural rhythms of plants and animals, affecting behaviours such as mating, sleep, and finding food. It also disrupts nocturnal ecosystems, mars the wilderness experience and landscape beauty, and wastes energy. To decrease light pollution, individuals, institutions, and governments should take actions such as changing light bulbs and fixtures, adopting measures to protect biodiversity, and creating dark sky areas. Additionally, simple habits like turning off unnecessary lights, using window shades, and reducing the use of devices in the evening can contribute to reducing light pollution.
How to Decrease Light Pollution
| Characteristics | Values |
|---|---|
| Lighting products | Use low-pressure sodium lighting or LED lights with motion sensors |
| Light direction | Ensure lights are directed downwards |
| Light levels | Use only the amount of light needed for a specific purpose |
| Legislation | Advocate for local lighting ordinances |
| Education | Raise awareness of the negative impacts of light pollution and how to limit it |
| Community action | Work with communities to establish codes and statutes that reduce light pollution |
| Certification | Support the certification of lighting products, designs, and installations that reduce light pollution |
| Outdoor lighting | Use night sky-approved lighting for exterior lighting |
| Window shades | Use window shades to prevent room lights from escaping |
| Driving at night | Avoid driving at night and using headlights, which contributes to light pollution |
| Device usage | Reduce the use of devices in the evening and switch to a dimmer night setting |
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What You'll Learn
Use window shades to block indoor light from escaping
Light pollution is a human-made alteration of outdoor light levels from those occurring naturally. It has harmful effects on streetlights, greenhouses, satellites, nocturnal ecosystems, plant and animal life, human health, safety, energy waste, and more.
One way to decrease light pollution is to use window shades to block indoor light from escaping. This is especially important in close quarters such as hotels or apartment buildings, where indoor lighting contributes to light pollution. Window shades can help keep room lights from escaping, reducing light pollution outdoors.
There are several types of window shades that can effectively block light. Blackout shades, for example, are designed to completely block out all incoming light. They are made from thick, opaque fabrics and may include an additional liner to ensure complete light blocking. Roller shades are another option, though they may not be ideal for bedrooms as some light can pass through the sides. For a more natural light feel, room darkening shades are made from thick, opaque fabrics but do not completely block out light.
When choosing a window shade, consider both function and aesthetics. Blackout shades, for instance, may not always be the most stylish option, while lighter-colored shades can create an airy feel but may let in more natural light. The level of light blockage depends on individual needs and preferences. For maximum light blockage, choose blackout shades in a dark color. If you want to brighten up the space, opt for lighter-colored shades, but keep in mind that the room-darkening effect may be lessened.
In addition to window shades, there are other ways to reduce light pollution. Turning off lights when not in use can help lessen light pollution and reduce energy costs. Using devices with dimmer night settings or reducing their use in the evening can also help, as the bright lights of screens contribute to light pollution.
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Limit screen time and use night mode when possible
Light pollution is a human-made alteration of outdoor light levels from those occurring naturally. It has been found to harm the environment, wildlife habitats, and our quality of life. With the increased use of devices such as computers, laptops, phones, etc., screens can contribute to light pollution, especially after dark. Here are some ways to limit screen time and use night mode:
Limit screen time:
- Reduce the use of devices in the evening.
- Avoid using devices with bright screens after dark.
Use night mode:
- Switch to a dimmer night setting on devices after dark.
- Use night mode or a similar feature on devices to reduce screen brightness and blue light exposure.
By limiting screen time and using night mode when possible, you can help reduce light pollution and its negative impacts on the environment and wildlife. It is also beneficial for your eyes and can enhance your experience of the night sky.
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Avoid driving at night
Light pollution is a human-made alteration of outdoor light levels from those occurring naturally. It has severely disrupted nocturnal ecosystems, interfered with the natural rhythms of plants and animals, marred the wilderness experience and landscape beauty, carried risks to human health and safety, and wasted energy.
One of the many sources of light pollution is car lights. To reduce light pollution, it is advisable to avoid driving at night unless it is necessary. Using headlights contributes to the degradation of our night skies. It is also safer to avoid driving at night as some people have a lack of depth perception. When using flashlights or headlights, always try to point them down to the ground.
To further reduce light pollution, individuals can use window shades to keep room lights from escaping their houses or hotel rooms. This also allows for privacy, especially in close quarters such as hotel or apartment buildings. It is also important to remember that indoor lighting contributes to light pollution outside, and natural darkness should be the default at night.
Individuals can also reduce light pollution by turning off lights when they don't need them. This will help lessen overall light pollution and reduce energy costs at home. It is also important to use lighting only for a specific purpose. Every bulb must have a purpose, and a pretty aesthetic is not a good enough reason to use lighting.
Another way to reduce light pollution is to use smart devices and smart timers to ensure lights are only on when needed. Individuals can also install motion sensors or timers to banish dusk-til-dawn sensors from their lawns.
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Support local legislation for better lighting ordinances
Light pollution is a human-made alteration of outdoor light levels from those occurring naturally. It has harmful effects on streetlights, greenhouses, and satellites, among other things. Thousands of migrating birds and shorebirds are killed each year due to unnecessary artificial light at night, and light pollution also threatens aquatic ecosystems. It further impacts our quality of life by eradicating our access to beautiful night skies.
To combat this, individuals, institutions, and governments should take action to limit light pollution. One way to do this is by supporting local legislation for better lighting ordinances. Citizens can band together to enact local legislation, and light pollution advocacy groups can make great strides in this regard. Dark Sky International, for example, works with communities and professionals to establish codes and statutes that reduce light pollution. They inform the public about how excessive artificial light can harm humans, wildlife, and the climate.
You can support such initiatives by joining email lists to stay informed about the latest news and advocacy efforts. Additionally, you can advocate for the following:
- The use of shielding to reduce glare and light trespass onto neighbouring properties.
- The adoption of measures governing development around biodiversity and protected areas.
- The creation and promotion of dark-sky areas.
- The use of LED lights with motion sensors, which can be dimmed when nobody is around and brightened when activity is detected.
By supporting local legislation and advocating for better lighting ordinances, you can help reduce light pollution and protect the environment, wildlife, and our quality of life.
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Choose downward-facing, motion-activated, and dimmable outdoor lighting
Light pollution is the human-made alteration of outdoor light levels from those occurring naturally. It has harmful effects on streetlights, greenhouses, satellites, and more. It severely disrupts nocturnal ecosystems, interferes with the natural rhythms of plants and animals, mars the wilderness experience, carries risks to human health and safety, and wastes energy.
To reduce light pollution, one should choose downward-facing, motion-activated, and dimmable outdoor lighting. This is because light fixtures that are pointed downwards limit the light spectrum emitted and keep light where it is needed, reducing light pollution. Motion-activated lights ensure that light is available only when it is needed and is turned off when not in use. Dimmable lights allow for the lowest light level required, reducing light pollution when needed.
DarkSky International, a world-leading authority on light pollution, certifies lighting products, designs, and installations that reduce light pollution. They work with communities and professionals to establish codes and statutes that reduce light pollution. They also educate the public on how excessive artificial light can harm humans, wildlife, and the climate.
By applying these principles, properly designed lighting can be beautiful, healthy, and functional. Light should have a clear purpose and be used only when necessary. It should be directed downward, minimizing glare and light trespass onto neighbouring properties.
In addition to choosing the right outdoor lighting, individuals can take other actions to reduce light pollution, such as turning off lights when not in use, using window shades to keep room lights from escaping, and reducing the use of devices and screens in the evening.
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Frequently asked questions
Light pollution is the human-made alteration of outdoor light levels from those occurring naturally. It has harmful effects on nocturnal ecosystems, wildlife habitats, human health, and our quality of life.
Here are some ways to decrease light pollution:
- Turn off lights when not in use.
- Use window shades to prevent room lights from escaping.
- Limit the use of devices in the evening.
- Switch to LED lights, which are dimmable and use less power.
- Avoid driving at night, and use headlights sparingly.
- Support local initiatives and organisations working to reduce light pollution.
Reducing light pollution helps restore the natural nighttime environment, protects wildlife and ecosystems, improves human health and safety, and enhances our experience of the night sky. It also reduces energy waste and costs.
