People see a fitting in a hardware store and assume a light's a light. Outside, it isn't.
IP65 is the floor. Dust tight and able to cop a water jet. IP66 is better, and it's what Glenn puts anywhere rain hits directly. An indoor fitting used outside takes on moisture, corrodes and fails, usually in the first wet season.
Cable has to go underground properly. In conduit, at 300mm minimum, and 600mm under a driveway. That depth is there so a spade or a post hole doesn't find it. Cable stapled along a fence line is the thing Glenn most often gets called out to fix.
The circuit needs RCD protection. Anything outdoors gets wet, and wet plus electricity is where people get hurt. Every outdoor circuit Glenn runs goes on an RCD, with UV-stable housings and glands that actually seal.





