Greta Jimenez
Light pollution is a human-made alteration of outdoor light levels from those occurring naturally, and it has harmful effects on streetlights, greenhouses, satellites, and more. It is linked to natural habitat disruption, negative impacts on human health, and interference with the aesthetic beauty of the environment. Light pollution is caused by excessive decorative lighting during festivities and celebrations, bright hotel room lights, car lights, home lights, and more. To clean up light pollution, individuals can use glare-free bulbs, install low-hanging bulbs, ensure lights are facing downwards, and cover bulbs to reduce bright skies at night. Additionally, individuals can use window shades to prevent room lights from escaping, reduce night driving, minimise the use of devices in the evening, and use dimmer settings on devices and lights.
| Characteristics | Values |
|---|---|
| Type of lightbulbs | Use covered bulbs that face downwards, with warm-colored bulbs such as Low-pressure Sodium (LPS), High-pressure Sodium (HPS), and low-color-temperature LEDs. |
| Lighting levels | Avoid excessive lighting, especially during festivities and celebrations. Use dim lighting for streets and highways that are already lit with artificial lighting. |
| Energy efficiency | Use LED lights to reduce energy use and protect the environment. |
| Driving | Avoid driving at night unless necessary, as headlights contribute to light pollution. |
| Devices | Reduce the use of devices in the evening and switch to a dimmer night setting. |
| Legislation | Advocate for local legislation and policies to reduce light pollution, such as the Model Lighting Ordinance. |
| Community education | Educate communities about the harmful effects of light pollution on humans, wildlife, and the climate. |
| Alternative lighting | Use environmentally-friendly candles during celebrations and Core Glow stones for outdoor lighting. |
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What You'll Learn
Use covered, downward-facing bulbs
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 sources. It is linked to natural habitat disruption and negative impacts on human health. It also interferes with the aesthetic beauty of the environment.
To reduce light pollution, it is recommended to use covered, downward-facing bulbs. This is because when light points upward, it contributes directly to the artificial sky, brightening the night sky and causing light pollution. By using covered bulbs that light faces downwards, you can help reduce the brightening of the skies and lower the level of light pollution.
The International Dark-Sky Association (IDA) offers tips and works with policymakers to improve light pollution legislation. They recommend using warm-colored bulbs for outdoor lighting, such as Low-pressure Sodium (LPS), High-pressure Sodium (HPS), and low-color-temperature LEDs. These bulbs minimize blue emission, which is harmful to the environment and wildlife.
In addition to using covered, downward-facing bulbs, you can also reduce light pollution by using energy-saving features such as timers, motion sensors, and dimmers. Ensuring that your light fixtures are shielded so that light shines down, not up, will also help reduce light pollution. Properly designed lighting can be beautiful, healthy, and functional, and it is important to choose better outdoor lighting to minimize light pollution.
By implementing these measures, you can help reduce light pollution and protect the environment and wildlife while also conserving energy.
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Avoid decorative lighting during festivities
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 many other sources. It is linked to natural habitat disruption, negative impacts on human health, and interference with the aesthetic beauty of the environment.
Festivities and celebration periods often lead to the excessive use of decorative lighting kept on all day and night. While these lights are convenient, they also cause light pollution. Therefore, it is recommended to reduce the use of decorative lighting during festivities and opt for environmentally friendly candles instead. This also applies to street lights and highway lighting, which must be properly designed to avoid excessive illumination in the sky.
To avoid light pollution during festivities, consider the following:
- Use fewer decorative lights: Only use the amount of lighting necessary for the occasion. Avoid going overboard with lighting displays, and try to minimise the number of lights used.
- Reduce duration: Keep decorative lights turned off during the day and limit their use at night. There is no need to have them on all day and night. Use timers or motion sensors to control the duration of their use.
- Opt for dimmer lights: Instead of bright, intense lights, choose dimmer options that reduce the overall light pollution levels.
- Use covered bulbs: When using string lights or other decorative lighting fixtures, opt for covered bulbs that direct light downwards. This will reduce the amount of light escaping upwards into the sky.
- Choose warm-coloured bulbs: Avoid blue or cool-coloured lights as they have a larger geographic reach and create more glare. Warm-coloured bulbs, such as yellow, red, or amber, produce less glare and are better for the environment.
By following these suggestions, you can help reduce light pollution during festivities and contribute to conserving energy and protecting the environment.
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Reduce screen time and use night mode
While light pollution is largely the result of bad lighting design, it is also caused by the overuse and misuse of artificial light at night. This includes street lamps, car lights, shopping mall lights, and illuminated signboards.
One of the simplest ways to reduce light pollution is to turn off lights when they are not needed. This can also help reduce energy costs. However, it is understood that in some cases, lights cannot simply be turned off. In these instances, there are other ways to reduce light pollution, such as using glare-free bulbs, installing low-hanging bulbs, and having lights facing downwards.
Another source of light pollution is screens, such as those on LED displays. The high luminance of LED displays can cause severe light interference and eye irritation, especially in dim environments. To reduce light pollution from screens, it is recommended to reduce screen time and use night mode when possible. Night mode reduces the blue light emitted by screens, which can interfere with sleep and cause eye strain. Reducing screen time can also help to alleviate eye strain and reduce the overall amount of light pollution emitted by screens.
In addition to reducing screen time and using night mode, there are other ways to mitigate the negative effects of LED displays on light pollution. For example, manufacturers can reduce blue-ray output while still ensuring the screen's display functions. Additionally, safety precautions and adjustments to screen luminance should be included in the operating instructions of LED display products. By following these instructions, users can protect themselves from the potential harm caused by looking at LED screens for extended periods.
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Support Dark Sky initiatives
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 sources. The dark sky movement has made significant progress in combating light pollution since the first dark sky legislation in 1958. Dark Sky International, previously a small Arizona-based nonprofit, has emerged as the world's leading authority on light pollution.
- Educate yourself and others: Understand the harmful effects of light pollution on the environment, wildlife, and human health. Spread awareness about responsible lighting practices and the importance of conserving dark skies.
- Advocate for legislation: Support the passing of dark sky-friendly legislation at the local, regional, and national levels. Work with community groups, universities, and local businesses to establish codes and statutes that reduce light pollution.
- Choose better lighting: Opt for covered bulbs that face downwards, reducing the brightening of the skies. Use warm-coloured LED bulbs with low colour temperatures to minimize blue emission, which has been shown to adversely affect wildlife.
- Reduce light usage: Turn off unnecessary indoor lighting, especially in empty buildings at night, to prevent light leakage into the night sky. Use dimmer settings on devices and screens after dark to reduce light pollution and give your eyes a break.
- Support Dark Sky organizations: Join organizations like Dark Sky International or the Dark Sky Society, which offer monthly memberships or donations to fund their advocacy, education, and certification efforts. These groups work with communities to establish best practices and conserve starry skies.
- Volunteer and participate: Get involved with local Dark Sky chapters or community groups working to reduce light pollution. Look for volunteer opportunities, attend events, and stay informed about responsible lighting practices and initiatives in your area.
By supporting Dark Sky initiatives, we can help restore the nighttime environment, protect wildlife and communities, and reclaim the beauty of starry night skies.
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Limit driving at night
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 sources. It is linked to natural habitat disruption, negative impacts on human health, and interference with the aesthetic beauty of the environment.
One way to reduce light pollution is to limit driving at night. Here are some ways to do that:
Plan your trips in advance
By planning your trips in advance, you can minimise the number of night drives. Try to schedule your outings during the day, especially if you know you will be returning home late. If you must drive at night, try to stick to well-lit areas to avoid using high-beam headlights, which contribute to light pollution.
Carpool when possible
If you know someone who is also going to the same area as you, consider carpooling. This reduces the number of cars on the road and, therefore, the amount of light pollution from headlights.
Use public transportation
Public transportation can be a great alternative to driving, especially if it is available in your area. By using buses or trains, you can avoid contributing to light pollution while also reducing your carbon footprint.
Be mindful of your surroundings
If you must drive at night, be mindful of your surroundings. Avoid using high-beam headlights in well-lit areas or when approaching oncoming traffic. Also, try to keep your interior car lights off when possible, as they can also contribute to light pollution.
Support initiatives for better street lighting
Poorly designed street lighting can contribute significantly to light pollution. Support initiatives that advocate for better-designed street lights that minimise light pollution. This includes lights that are shielded, facing downwards, and using warm-coloured bulbs.
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Frequently asked questions
Light pollution is caused by human-made alteration of outdoor light levels from those occurring naturally. Sources of light pollution include streetlights, greenhouses, satellites, decorative lighting, and electronic devices.
Light pollution has been linked to natural habitat disruption, negative impacts on human health, and interference with the aesthetic beauty of the environment. It disrupts the natural cycles and operations of wildlife, causing the deaths of thousands of migrating birds and shorebirds each year. It also threatens aquatic ecosystems by increasing the risk of harmful algae blooms.
There are several ways to minimise light pollution. These include using glare-free bulbs, installing low-hanging bulbs, having lights facing downwards, and covering bulbs to reduce the brightening of the skies. Using energy-saving features such as timers, motion sensors, and dimmers can also help, as can reducing the use of electronic devices in the evening.
