[SQM] SQM unit vs luminance meter

Dan Taylor dctaylor at xplornet.com
Tue Nov 30 10:01:28 UTC 2010


I have been asked by a local conservation group, to present an argument for 
lighting restrictions at a proposed development, that will go before a 
regional municipal board.

At issue is the sky conditions at the site. In short, developer proponents 
have hired a lighting engineer who has used a luminance meter to form the 
basis of his position.

Are there any documents available that explain the differences and 
similarities between a SQM unit and a luminance meter and why a SQM unit is 
better suited to measure sky brightness?


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