A vibrant neon sign designed with a realistic sci-fi aesthetic, featuring a sleek metal frame that houses glowing glass tubes filled with neon gas. The tubes are bent into intricate shapes or letters, emitting a bright, luminous glow in various colors such as electric blue, hot pink, or neon green. The sign's surface has a slightly weathered look, with subtle scratches and dust accumulation to suggest it's part of a bustling, lived-in space environment. The base is made of durable, slightly tarnished metal, with visible wiring and connectors that hint at its functionality within a high-tech setting.