The Lage lighthouse of Heist is a Belgian lighthouse whose light has been extinguished. After the Zwin became silted up as a waterway, the city of Bruges looked for another way out to the sea, and found it at the beginning of the 20th century with the seaport of Zeebrugge. The channel to this harbor was called Pas van 't Zand and was deepened. To mark out this waterway, two engineering contractors had two lighthouses built. One of these two lighthouses was the Low Lighthouse of Heist, which was built between 1905 and 1907. Together with the High Lighthouse of Heist, it formed a light line for ships that wanted to enter the port of Zeebrugge. The light line was visible to ships that had the correct heading of 136 degrees, so that the beams of the low guide light and the high guide light were aligned. Due to the expansion of the port of Zeebrugge, the lighthouse lost its function and the light was extinguished in 1983.
The lighthouse stands at the end of the Zeedijk van Heist (albeit on the territory of Bruges-Zeebrugge) in the shadow of the buildings on that seawall next to an active much higher light curb that has taken over the function of the high light from Heist since 1983.