Which sources of light used by man in past?

In the past, humans primarily used natural sources of light, such as sunlight and fire, for illumination. They utilized torches, candles, and oil lamps made from animal fats or plant oils to light their homes and workspaces. Additionally, in some cultures, gas lamps became popular in the 19th century, providing a brighter and more controllable source of light compared to earlier methods. These early lighting sources were essential for extending productive hours beyond daylight.