1. Information from www.nightwise.org
Let There Be Night
Information from

2. But we don’t need light pollution!
We need light, right?
Safety from crime
Visibility on roadways
Comfort when walking at night
Advertising
But we don’t need light pollution!

3. What is light pollution?
Glare – light striking your eye
Spillover – light that lights up more than it is supposed to
Skyglow – light that goes up and makes the sky “glow”

4. Glare (light in your eyes)

5. Spillover (light beyond where it should be)

6. Skyglow light that makes the sky “glow”

7. Why should I care? Spoils the view of stars
Reduces your ability to see in darkness
Costs money
Wastes energy
Confuses and harms wildlife (sea turtles)

8. These are good lights (lights are shielded and aim down)

9. Solutions Aim lights downward Use lights that are fully shielded
Reduce light output (not so bright)