18 September 2015 at 11:59 am #577048
I also use a Unihedron SQM to measure the sky brightness on every decent night I observe. It appears to produce consistantly accurate results but I’m not sure how comparable the measurements are with other meters.
Its always better to have a quantitive measurement of your observing sky rather than a subjective assessment. The measurements of my home sky are being used by the Local Authority to deturmine the effects to light pollution of the change over from sodium to LED streetlighting in my area.