Compose an Illustration Depicting a Lively 19th-century Steampunk Laboratory

Compose an illustration depicting a lively 19th-century steampunk laboratory rendered in sepia tones. Feature inventors dressed in Victorian-style clothing as they work on elaborate steam-powered machinery filled with gears. Include dramatic beams of light streaming through large, dirt-streaked windows, illuminating clocks, brass tools, and mechanical creations. Design the environment to exude an industrial charm mixed with an air of mystery, inspired by the artistic style of Jules Verne-themed adventure posters. Place a scientist at the center, holding a glowing, futuristic energy source with a victorious expression.