At night the lit glass glows to indicate local weather conditions: green when weather is fair and red when atmospheric pressure drops, warning passing yachtsmen of possible stormy conditions.

到了晚上，发光的玻璃亮起，来指示当地的天气情况：天气晴朗时显示绿色，气压下降时显示红色，以此来警告通过的游艇可能会出现暴风雨的情况。