Light where you need it, when you need it, in the amount needed, and no more. If light is deemed useful and necessary, follow these guidelines to prevent, or when that’s not possible, minimize light pollution.
Responsible outdoor lighting is:
1. Useful
Use light only if it is needed
All light should have a clear purpose. Consider how the use of light will impact the area, including wildlife and their habitats.
2. Targeted
Direct light so it falls only where it is needed
Use shielding and careful aiming to target the direction of the light beam so that it points downward and does not spill beyond where it is needed.
3. Low level
Light should be no brighter than necessary
Use the lowest light level required. Be mindful of surface conditions, as some surfaces may reflect more light into the night sky than intended.
4. Controlled
Use light only when it is needed
Use controls such as timers or motion detectors to ensure that light is available when it is needed, dimmed when possible, and turned off when not needed.
5. Warm-colored
Use warmer-color lights where possible
Limit the amount of shorter wavelength (blue-violet) light to the least amount needed.
Does your outdoor lighting meet these important principles? Audit your home and find out. Here’s a handy infographic you can use to determine how well your home is meeting these guidelines.
