What is the distance between the base light and directional light on a T light pattern?

• A. 14 meters
• B. 20 meters
• C. 10 meters
• D. 7 meters

Answer: (C)

In a T light pattern, the goal is to achieve even illumination of the load and rigging with minimal shadows and well-defined visibility of all attachment points. The base light provides the primary, centralized illumination, while directional lights reach from the sides to fill in shadows and highlight rigging details.

Placing the directional lights about 10 meters from the base light strikes the right balance between beam overlap and reach. With typical light fixtures and beam angles, this spacing ensures the cones from the base and from the directional lights intersect over the critical areas of the load. That overlap reduces dark spots and keeps the rigging and hook points clearly visible as you approach setup, hook, and release.

Distances that are smaller can cause excessively bright hotspots and harsh shadows, making some areas too glare-prone or uneven. Distances that are larger can cause insufficient coverage, leaving gaps in illumination and dim outlines of rigging or attachment points. Ten meters provides the best compromise for even coverage and practical visibility in a T pattern.