Using these Hathor bollard lights is straightforward. First, find a solid surface like a concrete path or a sturdy timber deck for installation. Remember, a licenced electrician must handle the installation as per the instructions in the box. Connect the lights using circular cable in the junction, and for parallel or single connections, use an appropriate IP68 connector. These lights work with a voltage from 100 - 240V AC at 50/60Hz, so they're quite versatile. They can't be dimmed, but they're great for 2 - way switching and can work with PIR or Microwave sensors. As for maintenance, keep an eye on the ambient temperature. They can handle temperatures from - 20 to 50°C. Don't use them in harsh weather or heavy rainfall without proper protection; if you're in such an environment, consider getting IP65 fittings instead. Also, check the IP rating before using them to ensure it matches your needs and to avoid warranty problems. With a 3 - year replacement warranty, you can have peace of mind.