The Trieux estuary at Lézardrieux seems to be a difficult passage for boats because of tides. There are many lights in the estuary, but no classification ?
I checked - they are all unlit beacons.
Look at my pictures! Some beacons seems to be lit!?
It's unclear on the photos if this light on the top or just a topmark but anyway on the official chart they do not carry the lights that's why they are absent in Admiralty list.