What type of wire is commonly used for residential outdoor lighting?

The use of UF (underground feeder) wire for residential outdoor lighting is appropriate due to its design and insulation properties that accommodate outdoor conditions. UF wire is specifically manufactured to withstand moisture and is suitable for direct burial in the ground, making it ideal for outdoor applications such as landscaping and garden lighting where it may be exposed to the elements. Additionally, UF wire can handle outdoor voltage requirements, ensuring safety and durability in installations that are often subject to environmental stressors.

Other types of wire, such as NM (non-metallic) wire, are intended primarily for indoor use and would not meet the necessary requirements for outdoor exposure, as they lack the moisture and weather resistance that UF wire provides. Similarly, while THHN wire is useful for indoor applications and can be used in conduit, it is not recommended for direct burial without additional protective measures. Aluminum Gauge wire does not specifically reflect a standardized type of wire commonly referred to in residential lighting systems, which is why it is less suitable for outdoor lighting applications compared to UF wire.