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Well I have got the wide version of the SQM so it takes a bigger sample of the whole sky, and the numbers run something like this. Anything above 21 is considered a dark site. At 22 and above it is a world class dark site. Measurements don't exceed 22 by very much anywhere on earth. Coonabarabran rates between 21.5 to 22.0, as the Milky Way is bright enough to affect readings when it is overhead.
So as you can see, Chaffey Dam is right up there. I haven't had my SQM long enough to measure the other sites, but that's what I bought it for. I have an inkling that Bretti will be a bit darker than Chaffey Dam. Lostock and Pony Club will surely be brighter, but will have to wait and see what the numbers say.
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