[Chaos-l] Light pollution reduction opportunity: New lighting in Raleigh

[Stewart-Taylor, Jon]

Hi all.  Terry made some good points, then asked:

> BTW, what is "full cutoff?"  

A full cutoff fixture is one which emits no light above horizontal, i.e.
Good Lighting.  For reference, you can visit:

http://www.iesna.org/PDF/FullCutoffLighting.pdf for the legal definition
and diagrams, or http://www.darksky.org/images/slide-set-d.html for IDA
slide sets showing why full cutoff lighting is preferred, and several
examples of fixtures.

Hope that helps.

J.
-- 
Jon Stewart-Taylor: joncst at earthlink.net; 919-967-2912	
Chapel Hill Astronomy: http://rtpnet.org/chaos/	
Light pollution information: http://www.ncdarksky.org/