Which lighting type is often referred to as spill?

The term "spill" in the context of lighting refers to light that unintentionally exceeds its intended area of illumination and affects surrounding spaces. This is particularly relevant when discussing light trespass, which occurs when unnecessary light crosses property boundaries, often affecting areas where it is not wanted, such as residential areas adjacent to sports facilities.

Light trespass is significant in facility management as it can lead to complaints from neighbors or issues with the local community regarding excess light pollution. Understanding this helps facility managers design lighting systems that minimize spill, ensuring that light serves its purpose effectively while respecting surrounding environments.

In contrast, glare refers specifically to excessive brightness that causes visual discomfort and can impede visibility. Ambient lighting provides overall illumination in a space but does not typically involve discussions about spill unless it adversely affects neighboring areas. Task lighting is directed specifically towards a work area for specific activities, thus is less associated with spill issues.