Things You Need to Consider About Street Lighting

As we all know that street lights are very important at night, for illuminating, decorating or safe living. And as the lights will be on for a long time, then efficient will be a key features, besides, there're other aspects of LED street lights: such as spacing, color, intensity, glare, aesthetics, impact on “dark sky,” controls, energy monitoring, public safety, place making, special events, and impacts on drivers, bicyclists, pedestrians, and the elderly and sight-disabled. (From Pittsburgh LED Street Light Research Project)

Key aspects of street lighting:

1.   Dimensions of night time vision looked at how the human eye sees at night; how glare affects vision; how uniformity of illuminance affects vision; and age-related vision loss.

2.   Considerations of lighting the public right-of-way included aspects of place making and ayfinding such as intensity, color temperature, color changing, and focal points.

3.   Aesthetic evaluations examined materials, facade lighting, luminaire style, and standardization.

4.   Performance considerations included varying viewpoints, illumination levels, glare and light trespass, uniformity, color rendering, ambient light, and safety.

5.   Operational considerations dealt with energy use, monitoring, durability, reliability, and light output.

6.   Political and social issues were addressed, including climate change, light pollution, age-related equity, and spatial equity.

7.   Biological/Public Health Considerations included color temperature and circadian rhythm.

Tips for replacing street lights:

Light Color - Colored light was acceptable for accents but not for general lighting of sidewalks or streets. Light color of the street lighting is to be white, preferably 3,500 Kelvin, but with an adjustable range from 2,800 to 5,000 Kelvin.

Color Rendering Index -  CRI must be 80 or greater.

Light Source - Choose energy saving light sources to reduce the energy bills, and the LED light source should not be visible to drivers, bicyclists or pedestrians unless they are directly under the fixture.

Luminaires or Fixtures - Replace the luminaires to that have reflectors/lenses (produce diffused light downward) to control glare or dark sky impact/intrusion.

Life Time - Buy high quality light and luminaires that have long lifespan.
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