1. Light Pollution
by L and J Nicoloro

2. What is light pollution?
Excessive, misdirected, or obtrusive (usually outdoor) light.
Brightening of the night sky that inhibits the observation of stars and planets, caused by street lights and other man-made sources.

3. Various Night Skies

4. Good Light Sources Good outdoor lighting should:
Optimize visibility at night for what we want lit
Minimize energy consumption
Minimize impact on the environment and ourselves
Minimize glare
Minimize light trespass

5. Identifying Light Pollution
Light that can be found rude, obstructive, or oppressive by the non-owners of the light

6. Kinds of Light Pollution
3 main kinds
Glare- light from unshielded sources.
Light trespass (AKA spill light)- unwanted light that enters one’s.
Skyglow- the combination of all the reflected light and upward-directed (unshielded) light escaping up into the sky (and for the most part, unused), causing the glow effect that can be seen over populated areas.

7. Kinds of Light Pollution (con’t)
Other types of pollution
Uplight- wasted light that goes directly up into the night sky, is "lost in space”, and serves no useful purpose.
Clutter- bright, confusing, ugly and excessive groupings of light sources, commonly found in over-lit urban areas.

8. Various Lighting Techniques

9. Light Pollution Diagram

10. Glare

11. Glare

12. Glare

13. Light Trespass

14. Light Trespass

15. Ineffective Lighting

16. Improving Lighting Designs

17. Minimizing Light Pollution

18. Improving Street Light Design

19. Improving Energy Efficiency

20. General More than half of the world’s population now living in cities
3 out of every 4 people in cities have never experienced pristinely dark skies

21. Maps of Light Pollution
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22. Light Pollution Increase (1950s-Projected 2025)

23. Squid Fisheries

24. The Effects of Light Pollution
Light pollution wastes
Light pollution consumes
Light pollution pollutes
Light pollution harms
Light pollution threatens
Light pollution destroys

25. How Light Pollution Affects Animals

26. Affect on Circadian Rhythm

27. Turn Out the Lights

28. Ashy Storm Petrel

29. Sea Turtle Cartoon

30. Baby Turtles

32. What This Means For the Future
Loss/endangerment of species
Health-related issues
Depletion of resources

33. How We Can Stop Light Pollution
Shielding lights properly
Only using light when and where it is needed
Only using the amount that is needed
Making sure exterior lighting only light the ground beneath them
Remember: need, intensity, duration, and spectrum

34. Resources Articles http://www.globeatnight.org/light-pollution.php
pollution/klinkenborg-text
ch.html

35. Resources (con’t) Images
ht-sky.jpg
content/uploads/2013/07/asc-csa.gc_.ca-efficient- lighting.gif
hts.jpg
security.html

36. Resources (con’t) Images
712f d252f4f6122b jpg
adian_rhythm.jpg
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content/uploads/2013/07/wired.com-light-pollution.jpg

37. Resources (con’t) Images http://old.nightwise.org/lot04608.JPG
y_lights_large.jpg
rticle/Light_Pollution_Diagram_680px.jpg

38. Resources (con’t) Images
id-fisheries.jpg
_Pollution_Article/Unshielded-Light-Waste-Large.jpg
ecitynetwork.com/content/tncms/assets/v3/editorial/9/71/ 97155ce4-3be9-11e1-a a4bcf6878/4f0cd500952f6.image.jpg

39. Resources (con’t) Images
urtlecartoon.jpg.html
ds_light_pollution.jpg
content/uploads/2009/08/ashystormpetrellight.jpg