Gorgeous Time Lapse Video Reveal a Nighttime Sky Free From Light Pollution. Also Stunning Moonrise

[progree]

5. Reminds me of PBS's POV - The City Dark, which can be watched (streamed) until Oct 9.

The link is at: http://www.pbs.org/pov/citydark/
and on the right side near top of the page is "Watch The Full Film Online"

Here are some notes I made on it at the time --

how city light pollution is affecting us. E.g. turtle hatchlings are disoriented by city lights and head for the light rather than the ocean. Some birds migrate at night, and use star maps in their heads to navigate; city lights disorient them. And birds attracted to lights fly into buildings. As for humans, breast cancer is 1.5X to 2X higher among shift workers. In rat studies, have found that tumors grow less or shrink more with high melatonin blood than low melatonin blood. Darkness increases the melatonin levels in the blood substantially (sigh).

As for what you are talking about -- security lighting -- I remember the film near the end discusses Bar Harbor, Maine passed an ordinance to allow only certain kinds of outdoor night lights -- ones that illuminated in a general downward direction -- not wastefully upward. Anyway, it made a very big difference to night sky viewing.

Google: bar harbor maine lighting ordinance