This form lets you retrieve light pollution measurements by time and station; the interval of data points is typically 10 minutes, where each data point is an average over several measurements.
For advanced queries, use ADQL possibly via TAP, on the lightmeter.measurements table.
Coverage for the last 400 days:
This database of lightmeter measurements is made available under the Open Database License: http://opendatacommons.org/licenses/odbl/1.0/.
Any rights in individual contents of the database are licensed under the Database Contents License: http://opendatacommons.org/licenses/dbcl/1.0/