TechnologyARMY on Instagram: "Before electricity lit our cities, miners relied on chemistry to light their world. 💡⛏️ A vintage calcium carbide lamp worked through a simple but genius reaction — water dripped onto calcium carbide, creating acetylene gas, which burned with a bright, steady white flame. By adjusting the drip rate, miners could literally control how much light they had underground. These lamps were dependable, portable, and vital — a perfect blend of science and survival that guid