Which type of lantern emits a hard-edged beam of light?

A profile spot lantern is designed to emit a hard-edged beam of light, making it ideal for creating defined shapes or patterns on stage. This type of lantern has a lens system that allows for precise control over the focus and shape of the light beam, enabling it to project sharp lines and defined edges. This quality is crucial in theatrical lighting when a designer needs to highlight specific areas or create a certain mood with distinct light effects.

In contrast, a Fresnel lantern produces a softer, diffused light that is great for general lighting or creating wash effects but does not offer the same level of edge sharpness. Flood lanterns are designed to spread light over a wide area, contributing to an even illumination without defined edges. Gel, on the other hand, refers to colored filters placed in front of lights to change their color, but does not pertain to the hardness or softness of the light beam itself.