Ask them why they put shades on their indoor
lamps... Reducing glare makes it more pleasant to be outside at night
(you can see better and there is no need to shield your eyes), improving
everyone's quality of life.


The shade of a lamp is one of the better anolgies I've read for describing why
it's of use to have cut-off fixtures.

Todd

http://www.backyardastronomy.com
http://www.skynewsmagazine.com
http://www.members.aol.com/tdcarls/s...otography.html