Alyn Wallace Talk On Light Pollution

[laser_jock99]

 

[Aramcheck]

Thanks for this! Recently there seems to be have been more in the press on light pollution (unless I'm just more aware of the coverage) & there is a big push for Smart Cities where street lighting can be varied according to requirements using the Internet of Things & central management systems. Hopefully this will lead to dimming of lights where appropriate & better use of lighting in general. We need legislation similar to that passed at the beginning of the year in France...

I get the feeling though, that outside of the Astronomical community, the problem is largely unnoticed. Maybe we need to engage more with environmentalists to raise awareness of the problem.

Studies in Tucson & modelling by the US DOE do however suggest that skyglow has modest reductions from the introduction of lower CCT LED lights, largely because the lights are more directional & also shine less light above the horizontal.

In Leeds the street lights are due to be replaced with LEDs (4000k CCT on main roads & 3000k in the majority of residential areas), but the extent to which the  CMS system will/may be implemented is not clear...

Cheers
Ivor

[SteveNickolls]

Thanks for making this available on SGL.  Cheers Steve

 

Edited December 19, 2019 by SteveNickolls

[maw lod qan]

I have noticed most of the newer street lamps and those in parking areas do point directly down and also don't protrude beneath the housing.

Sadly they still take floodlights and illuminate the sides of many buildings with the lights pointing upward.

[Aramcheck]

France is the leading light...

https://www.darksky.org/france-light-pollution-law-2018/