Which substance was initially in high demand for lighting homes in the mid-19th century?

Whale oil was initially in high demand for lighting homes in the mid-19th century due to its effectiveness as a fuel source for lamps. This substance burned brighter and cleaner than many alternatives available at the time, making it a popular choice in households for illuminating spaces. The whaling industry prospered during this period as demand for whale oil increased, driven by both its use in lighting and as a lubricant and in other applications.

As society advanced, alternative lighting methods, such as gas and electricity, began to emerge and replace whale oil. However, during the mid-19th century, whale oil was still considered the standard for home lighting before these newer technologies became widespread. This historical context highlights the significance of whale oil in the energy transition of that era.