Using these GU10 exterior wall pillar spot lights is easy. First, make sure you hire a licenced electrician to install them according to the instructions in the box. After installation, if you haven't already, insert the recommended CLA LED globes GU1001 or GU1002 into the GU10 lamp holder. The lights work with an input voltage between 110 - 265V AC 50/60Hz, so they can be used in many places. When it comes to maintenance, since they have an IP65 rating, they can handle dust and water well. But it's still a good idea to check them regularly for any signs of damage. If you notice anything wrong within the 2 - year warranty period, you can get a replacement. Just ensure that the IP rating of these lights is appropriate for where you're using them to avoid disappointment and warranty problems.