What type of fuel did they use to keep the flame of the Lighthouse of Alexandria burning?

The Lighthouse of Alexandria, also known as the Pharos of Alexandria, likely used a combination of materials to keep its flame burning. While the exact fuel is not definitively known, it is believed that they used a mixture of wood and possibly oil, such as olive oil, which would have been readily available in the region. The use of reflective surfaces, possibly including polished metal, helped amplify the light from the flame, making it visible to ships far out at sea.