Comment by thombat

The size of the points shows the reported visible range, the colour and pattern of blinks represents how the light should appear. But this all depends upon the OSM data being entered correctly, and as https://github.com/geodienst/lighthousemap#readme notes:

"contains my best guess on how a light sequence will look based on these descriptions. However, it might be inaccurate, and it tries to do its best with the sometimes not entirely consistent data from OSM."