I have been installing low voltage landscaping lights for several years, and we recently purchased a 120 year old house in town. We have an original cast iron fence right behind the public sidewalk, and we wanted something behind the fence to light the sidewalk.
These are great. I added these to the same circuit I was already using to light the front of the house, using 16 gauge wire. I used a post hole digger to dig out the holes, and then concreted them into position without filling up the hole (which I filled with dirt once everything was all hooked up).
Speaking of hooking the lights up, I do not use the standard connectors that the vendors typically supply. They’re just not waterproof enough nor will stand up to corrosion for the long haul. (Ask me how I know….). I twist my connections together, then I solder them. I then put them in an end crimp connector, and after it’s crimped, I fill it with silicone. Yes it seems like overkill, but you have to anticipate that periods of heavy rainfall, heat and cold. Your electrical connections could even be submerged for periods of time. If you do it the way I just described you won’t have any issues with electrical shorts or corrosion. Whatever you do, don’t use electrical tape! It’s not designed for this.
The concrete in the hole is important with lights like this, because they’re gonna be taking a wind load from time to time as well as being bumped into by people and pets. You want them to stay in position. And as others have noted, the stake on these things isn’t particularly long. But no issue if your concrete it; a 40 pound bag is cheap. I used a bag and a half.
These lights are very nicely made, and I really like having a color temperature selection. I’ve enclosed pictures during the installation where you can see the concrete inside the hole as well as pictures (from last night) with them lighting up the sidewalk.