To qualify as a light hazard for the purpose of extinguisher selection and placement, the majority of materials in the area must:

To qualify as a light hazard for extinguisher selection and placement, the majority of materials in the area must have low combustibility. This characteristic is essential because it indicates that the materials present are less likely to ignite and sustain a fire, making it safer for both occupants and firefighters.

Light hazards typically include environments where the chance of a fire developing is minimal due to the nature of the materials present. These areas commonly feature materials that do not ignite easily, which in turn affects the type and placement of fire extinguishers necessary for effective fire protection. Understanding the combustibility of materials is fundamental in ensuring appropriate fire safety strategies are in place, as these will inform decisions regarding the necessary equipment and its proximity to potential fire risks.

The other options address different fire characteristics but do not specifically identify the necessary condition of having low combustibility that defines light hazards.