Looking back at how many people CPRE claim to have submitted results;
2021- 7-8000 as their website mentioned both figures depending on what part of it you looked at
Further back I haven’t got the figures, but this does raise concerns about their conclusions, is the drop in light pollution due to fewer people contributing this year when compared to 2021. I’ve lived here for 6 years and in that time Caerphilly council has replaced most of the streetlights with LED from the sodium and mercury lights and they switch them off between midnight and 5am, plus security lights have increased dramatically.
The change in the colour of the skyglow from Bristol, Newport and Cardiff has noticeably changed now LED lighting is commonplace.