As part of our IDA application, we began regularly taking sky quality measurements. We use a Unihedron SQM light meter to take these measurements.
For the application we used data from February – November 2021, which had an average reading of 21.50 using all the data points, and 21.60 when removing the outliers.
We have continued taking measurements regularly since then. As of August 2026, the spreadsheet includes more than 1,400 readings, with an overall average reading of 21.44.
Below is a link to the spreadsheet where we store the data for our sky quality measurements, updated as new readings are taken.