Using these garden spike lights is easy. First, have a licensed electrician install them according to the instructions in the box. Connect the cable, making sure to use circular cable at the junction. For parallel or single connections, use an appropriate IP68 connector. These lights work with an input voltage between 12 - 25V AC/DC. Keep in mind that the globe is not included, so you'll need to buy one that fits the 1xMR16 lamp holder and has a max power of 20W. To maintain their performance, make sure the IP rating matches your intended use. They come with a 2 - year replacement warranty, so if there are any problems, you're covered.