This multi-function solar lighthouse beacon has 3 modes to choose from: steady, blinking, and revolving. A mode button on the back of the solar panel changes the function, and the beacon returns to your last selection when it comes back on at dusk. Now you can have a fully functional lawn lighthouse beacon without electricity. This is a great beacon for those building their own DIY yard lighthouse, and it can also be used to upgrade older existing lighthouses. Many inexpensive solar beacons are small, use a single low-wattage garden pathway LED, and are barely bright enough to see. Ours are built to last.