Whale oil lamps were a popular source of light in the 19th century, using oil extracted from whales, particularly from the blubber of sperm whales. The oil burned brightly and produced a steady flame, making it an effective lighting option before the advent of electricity. These lamps typically featured a wick that drew the oil up from a reservoir, allowing for adjustable brightness. As whaling declined and alternative lighting sources emerged, such as kerosene lamps, the use of whale oil lamps diminished, marking a significant shift in lighting technology.