I redid all of my landscape lighting many years ago...ran all new wires, and did all the connections myself. I used direct burial landscape lighting cable (12 gauge for most of it) along with the grease filled wire nuts. I have had 0 problems with it since, although we only get what I'd consider a lot of rain in the spring. Since all the bulbs are LEDs, I've only had to mess with the system once over the past 7 years - some of the floods started crapping out after about 5 years or so, so I just replaced them all and haven't messed with them since.