What is a thin cardboard tube filled with color-producing pyrotechnic composition used for making ground display pieces called?

A thin cardboard tube filled with color-producing pyrotechnic composition used for making ground display pieces is known as a lance. In the context of fireworks, a lance is designed to produce effects such as flames, sparks, or colorful bursts when ignited. The composition inside the lance is specifically formulated to create vibrant colors and visual effects, making it a popular choice for ground displays.

Lances are typically used in specific arrangements to enhance the visual impact of a fireworks show. Understanding the function and construction of lances is essential for ensuring safety and effectiveness during a live display.

The other options refer to different pyrotechnic devices or components. An electrical firing unit is used for remote ignition of fireworks, a fusee typically refers to a flare or signaling device used in various applications, and a finale is a term used to describe the concluding segment of a fireworks display featuring a series of simultaneous or rapid explosions for dramatic effect.