What type of construction should luminaires have to prevent overheating combustible materials?

To prevent overheating combustible materials, luminaires should ideally have a guarded design. Guarded luminaires are specifically constructed to mitigate the risks of exposed hot surfaces, which can ignite nearby combustible materials. The guard acts as a protective barrier that helps maintain a safe distance between the light source and surrounding objects, thereby reducing the likelihood of fire hazards.

In addition, this type of construction often includes features that enhance air circulation around the light source, further helping to dissipate heat. By incorporating these protective elements, guarded luminaires effectively address safety concerns in environments where combustible materials may be present.

While other designs, such as enclosed or insulated, may offer some level of protection or heat management, they do not provide the same robust preventative measures against potential overheating and fire risks that a guarded design specifically ensures. Open designs, lacking barriers, can lead to direct contact between hot surfaces and combustibles, escalating safety concerns.