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Call to Action! Contact Chicago’s Administration to Demand a Responsible Outdoor Lighting Plan

Call to Action! Contact Chicago’s Administration to Demand a Responsible Outdoor Lighting Plan Thumbnail

IDA’s Executive Director, Scott Feierabend has sent an urgent letter to Chicago’s Mayor, Rahm Emanuel’s regarding the proposed outdoor lighting plan. This letter urges Emanuel and his Administration to choose a safe, responsible outdoor lighting… Read More

Why is Blue Light at Night Bad?

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New technical capabilities often come with unanticipated challenges. White LED lighting often has much higher levels of potentially harmful blue light. In 2010, IDA published its paper, “Visibility, Environmental, and Astronomical Issues Associated with Blue-Rich White… Read More

5 Popular Myths About LED Streetlights

Streetlights on city street at night create glare making it hard to see.

The rapid changes in LED lighting technology have given rise to an LED retrofit revolution. Across the globe, municipalities are opting to switch out their older street lighting to new, more energy-efficient LEDs. Unfortunately, these… Read More

Really, Really Bad Lighting

An "acorn" outdoor street light at night gives off a lot of glare because it's not shielded.

Good lighting is used only when needed, only where needed, in only the amount needed, and shielded so that the light does not emit into the sky. We’ve shared examples of good lighting, but every… Read More

Be Part of the Global Debate On LEDs

Light pollution in New York City. Photo by Jim Richardson.

For the past five years, IDA has sounded the alarm about the environmental and health impacts of blue-rich white light-emitting diode (LED) street lighting that is replacing older technologies in cities across the globe. Recently… Read More

Night Lights and Prosperity Don’t Always Go Hand in Hand

Photo ISS043-E-247811 of North and South Korea from the International Space Station ISS.

By guest writer Chris Kyba North Korea is famously dark compared to South Korea and China at night, and images like the one above are often used to demonstrate the consequences of its “unenlightened” policies. I certainly wouldn’t… Read More

IDA Publishes in LED Professional magazine

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IDA is excited to announce the publication of our ‘special topic’ article “The Value of Dark Skies – About Environmentally Friendly Lighting” in the March/April issue of LED Professional magazine. We are always trying to reach industry… Read More

Lessons from the Retrofit Revolution

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A recent news article draws attention to a new street lighting project just completed in downtown Philadelphia, Pennsylvania. This retrofit included replacing hundreds of high-pressure sodium lights with new, more energy-efficient, white LEDs. Philadelphia officials had good intentions in deploying… Read More

City’s LED Retrofit Shows Need For Careful Lighting Choices

A neighborhood on a lake with tall trees reflected in the water.

By Guest Author Jim Benya The initial LED streetlight installation went awry, but this story has a happy ending Davis, California, is a small city adjacent to a large university. The city has a well-educated… Read More

Citizens Push Back on LED Lighting

Downtown main street of Liberal, Kansas sports new streetlights with old-time character, but which pour light out in all directions and up into the sky. With no shielding the exposed globes cause much glare that makes seeing difficult.

By Chris Kyba, IDA board member and light pollution researcher If you don’t like what you see, why don’t you fight it? If you know there’s something wrong why don’t you right it? –Trooper Citizens… Read More