Turn off all the lights in the room you're sitting in. That glow from your monitor is about as good as any indoor lighting available in Texas until after the Civil War.
In frontier cabins, the hearth fire was the most powerful source of light, but it was also a powerful source of heat. Not the most pleasant thing to work or read by in the Texas summer.
Most people made due with some type of primitive oil lamp. Not those pretty numbers with a glass chimneys and decorative shades. That was a generation away. Think of an old rag for a wick, stuck in a cup of hog grease.
There was a superior kind of oil lamp if you could afford it. It's called a candle. Yes, candles are technically oil lamps. The heat from the flame turns the the fuel from solid to liquid and it is drawn up by the wick and burned.
Candles were the preferred method of lighting your chamber. There were two kinds. Tallow, made from rendered fat, were smokey and offended the nose. They were also soft and tended to melt in the Texas heat, but the were they choice of the budget conscious. The other type of candle was bee's wax. Little smoke, no smell, but expensive.
Snuffing a candle was a valued skill. To snuff a candle actually means to trim the burnt end of the wick while still lit so that it doesn't smoke. So few people were good at it, that snuff became a euphemism for 'extinguish' and eventually 'to kill."
Antique Candle Snuffer
After the Civil War, and the commercialization of the Pennsylvania oil fields, paraffin candles and and kerosene lamp fuel improved things a great deal.
Texas cities had gas lighting available as early as the 1870s and were electrified by 1900.
For folks in the country though, the kerosene oil lamp lit their world until the push for rural electrification in the 1930s.